The Sexual Life of the Child/Chapter 3

In the previous chapter, I have described the differences between the reproductive organs of men and women, and between those of adults and children, respectively. Man and woman are, however, distinguished one from the other, not only by differences in their reproductive organs, but by other qualities as well, some of these being bodily, others mental. Such distinctive characters are spoken of as secondary sexual characters, in contradistinction to the primary sexual characters, the reproductive organs. Our terminology would, perhaps, be more exact if we were to regard the reproductive glands alone, the testicles and the ovaries, as primary sexual characters; including the rest of the genital organs among the secondary sexual characters. Havelock Ellis distinguishes, in addition to the primary and secondary sexual characters (as commonly defined), tertiary sexual characters, by which he denotes those differences between the sexes which do not attract our attention when we compare individual members of the two sexes, but which become noticeable when we compare the average male with the average female type. Among such tertiary sexual characters may be mentioned the comparatively flatter skull, the greater size and activity of the thyroid gland, and the lesser corpuscular richness of the blood, in women. Especially distinct are the secondary sexual characters in respect of general bodily structure. The form of the skeleton is different in the two sexes. Thus, in woman the pelvis is wider and shallower than in man. In the hair also there are notable differences: in woman the hair of the head tends to grow much longer, and woman is much less liable than man to premature baldness; the beard, on the other hand, is a masculine peculiarity. In woman the breasts attain a much greater development. The larynx is in man more prominent and longer; in woman it is wider and shallower. Woman's skin is more delicate than man's. And so on.

Now what have we to say regarding these sexual differences in the case of children? During the age which we have defined as the first period of childhood, except in the matter of the genital organs, we can detect hardly any important bodily characters distinguishing the sexes. Still, even at this early age some differences have been recorded. Thus, the average weight of new-born girls is less than that of new-born boys, the figures given by Stratz being, for boys, 3500 grams (7.7 lbs.); for girls, 3250 grains (7.15 lbs.). According to a very large number of measurements, the mean length of the now-born girl is somewhat less than that of the new-born boy, the difference amounting to nearly 1 cm. (2/5ths inch). Craniometric records, taken at the end of the first period of childhood, exhibit differences between the sexes; in general, the measurements show that the girl's head is smaller than the boy's in respect both of length and breadth. Further, dynamometric records, taken from children six years of age, have shown that the grasp in girls is less powerful than in boys. But if we except such differences as these, which relate rather to averages than to individuals, and which, moreover, are for the most part demonstrable only during the latter part of the first period of childhood, we find that, apart from the reproductive organs, very little difference between the sexes can be detected during the first years of life. Many investigators have been unable to confirm the assertion that even in the first year of life the hips are more powerfully developed in girls than in boys. Fehling, however, declares that as early as the fifth month of intra-uterine life, sexual differences manifest themselves in the formation of the pelvis. However this may be, it is beyond question that during the earlier years of the first period of childhood the differences between the sexes are comparatively trifling. But towards the end of this period, sexual differentiation becomes more marked. According to Stratz, it is at this time that the characteristic form of the lower half of the body develops. The thighs and the hips of the young girl exhibit a somewhat more marked deposit of fat than is seen in the boy of the same age. To a lesser extent the same is true of the calves. It is often assumed that even in very early childhood the sexes can be distinguished by the formation of the face. The girl's face is said to be rounder and fuller than the boy's; the expression of countenance in the former, to be more bashful and modest. Stratz, however, urges in opposition to this view, with justice, in my opinion, that we have here to do only with the effects of individual educational influences, or perhaps with individual variations, from which no general conclusions can safely be drawn.

During the second period of childhood sexual differences become much more distinct. Before considering these differences, I must say a few words regarding the growth of the child, since in this particular there exists a notable distinction between the sexes. Careful measurements have shown that during certain years of childhood growth occurs especially in height, whereas in other years the main increase is in girth. For this reason, it is customary to follow Bartels in his subdivision of each of the two periods of childhood into two subperiods. The age from one to four years is the first period of growth in girth; from the beginning of the fifth to the completion of the seventh year is the first period of growth in height; from the beginning of the eighth to the completion of the tenth year is the second period of growth in girth; and from the beginning of the eleventh to the completion of the fourteenth year is the second period of growth in height. During these periods there are certain differences in respect of growth between boys and girls. Although in general the growth in height of the boy exceeds that of the girl, there is a certain period during which the average height of girls is greater than that of boys. From the beginning of the eleventh year onwards, the girl grows in height so much more rapidly than the boy, that from this age until the beginning of the fifteenth year the average height of girls exceeds that of boys, although at all other ages the reverse is the case. In our consideration of the differences between the sexes, these differences in respect of growth must not be overlooked.

In addition to these, other important differences between the sexes manifest themselves during the second period of childhood. In the first place, it is an established fact that in the girl the secondary sexual characters make their appearance earlier than in the boy, the boy remaining longer in the comparatively neutral condition of childhood. We have seen that in the girl, at the end of the first period of childhood, the lower half of the body begins to resemble that of the woman in type. During the second period of childhood, this peculiarity becomes more marked; the pelvis and the hips widen, the thighs and the buttocks become more and more rounded; the enduring feminine characteristics in these respects are acquired. More gradually, the feminine development of the upper half of the body succeeds that of the lower; the transition from the lower jaw to the neck become less abrupt, and the face becomes fuller. The sexual difference in the growth of the hair also manifests itself in childhood. Whether cut or uncut, the girl's hair tends to grow longer than the boy's. Later, the typical development of the breasts occurs. As early as the beginning of the second period of childhood, the surface of the areola mammae may become slightly raised; but the typical deposit of fat, leading to the hemispherical prominence of the breast, does not begin until towards the close of the second period of childhood. Even later than this is the growth of the axillary and pubic hair. Various answers are given to the question as to the relation in time between the appearance of menstruation and the development of the sexual characters just described. Unquestionably there are great differences in this respect. Whereas Axel Key declared that the secondary sexual characters appeared before the first menstruation, according, to C. H. Stratz this is true only of girls belonging to the lower classes; whilst according to his own observations on girls belonging to the upper classes of society, the first menstruation precedes the development of the breasts and the growth of the pubic and axillary hair.

Concerning a number of sexual differences, during childhood, authors are not agreed. As regards the type of breathing, for instance, in the adult man, the abdominal type prevails; that is, the respiratory exchange of gases is effected chiefly by movements of the diaphragm and the abdominal muscles: whereas in the adult woman the respiration is costal, the respiratory exchange being effected chiefly by movements of the thorax. How unsettled our views are in respect of the types of respiration in children is well displayed by the collection of opinions given by Havelock Ellis. According to Boerhaave, sexual differences in the type of respiration were manifest even in very small children; but his observations have not been confirmed by others. Thus, Sibson states that the characteristic costal type of respiration begins in girls at the age of ten, for which reason some observers have assumed that the wearing of the corset is the cause of its appearance; others, however, among whom Hutchinson may be mentioned, deny this alleged causal connexion, stating that they have observed costal respiration in young girls who have never worn any constricting garments. Unquestionably, sexual differences in the type of respiration become apparent in the later years of childhood.

I have already pointed out that in girls the secondary sexual characters begin to make their appearance at an earlier age than in boys. In the onset of sexual differentiation, the boy thus plays a more passive part than the girl, inasmuch as he retains longer the childish type. None the less, in the boy also certain secondary sexual characters begin to develop comparatively early. Thus, in the second period of childhood, the boy's shoulders often become wider, his muscles stronger, than those of the girl. Since at the same period there occurs in girls the greater deposit of fat previously described, marked differences result in the external contours of the respective bodies. The boy's body is therefore much more angular and knobby, far less softly rounded, than that of the girl. Towards the end of the second period of childhood, an additional sexual character makes its appearance in the male sex, namely, the voice breaks. The chief remaining differences, the growth of the beard and the pubic hair, and the development of the characteristically masculine larynx, usually manifest themselves after the close of the second period of childhood--that is to say, during the period of youth.

As children become physically differentiated in respect of sex, so also does a mental differentiation ensue. Authorities are not agreed as to whether mental sexual differentiation exists in the very earliest years of life. Many assume its existence, and profess to have observed sexual differences even in the movements of quite small children. On the other hand, it is urged that the alleged differences are made up out of chance, auto-suggestion on the part of the observer, and the results of education. There is, however, general agreement as to the fact that during the second period of childhood mental differences become apparent between the sexes. Such differences are observed in the matter of occupation, of games, of movements, and numerous other details. Since man is to play the active part in life, boys rejoice especially in rough outdoor games. Girls, on the other hand, prefer such games as correspond to their future occupations. Hence their inclination to mother smaller children, and to play with dolls. Watch how a little girl takes care of her doll, washes it, dresses and undresses it. When only six or seven years of age, she is often an excellent nurse. As Padberg pictures her, she sits at the bedside of her sick brother or sister, resembling as she does so an angel in human form. Her need to occupy herself in such activities is often so great, that she pretends that her doll is ill. Chamisso, in his poem Das kleine Mädchen und die Puppe (The Little Girl and her Doll), describes this relationship between the child and her doll, one whose nature is fully understood only by a mother:--

"Wie Du mit den kleinen Kindern,  Will ich alles mit ihr tun,   Und sie soll in ihrer Wiege   Neben meinem Bette ruhn.   Schläft sie, werd' ich von ihr träumen,   Schreit sie auf, erwach' ich gleich,--   Meine himmlisch gute Mutter,   O, wie bin ich doch so reich!"

"All you do for your children,  For my Doll I do instead,   And in her little cradle   She lies beside my bed.   When she sleeps, I dream about her,   When she cries, I wake up too.   My own, dear, darling Mother,   I'm just as rich as you!" Once I saw a little girl of seven running up and down the room, carrying all kinds of things as fast as she could to her doll. When I asked her what was the matter, she told me that her doll had the measles, and she was taking care of her. In all kinds of ways, we see the little girl occupying herself in the activities and inclinations of her future existence. She practises housework; she has a little kitchen, in which she cooks for herself and her doll. She is fond of needlework. The care of her own person, and more especially its adornment, are not forgotten. I remember seeing a girl of three who kept on interrupting her elders' conversation by crying out "New clothes!" and would not keep quiet until these latter had been duly admired. The love of self-adornment is almost peculiar to female children; boys, on the other band, prefer rough outdoor games, in which their muscles are actively employed, robber-games, soldier-games, and the like. And whereas, in early childhood, both sexes are fond of very noisy games, the fondness for these disappears earlier in girls than in boys.

Differences between the sexes have been established also by means of experimental psychology, based upon the examination of a very large number of instances. Although it must be admitted that some of the acquirements of this school are still open to dispute, the data of these collective investigations must not be ignored. Berthold Hartmann has studied the childish circle of thought, by means of a series of experiments which are commonly spoken of as the Annaberg experiments. Schoolboys to the number of 660 and schoolgirls to the number of 652, at ages between 53/4 and 63/4 years, were subjected to examination. It was very remarkable to see how in respect of certain ideas, such as those of the triangle, cube, and circle, the girls greatly excelled the boys; whereas in respect of animals, minerals and social ideas, the boys were better informed than the girls. Characteristic of the differences between the sexes, according to Meumann, from whom I take these details, and some of those that follow, is the fact that the idea of "marriage" was known to only 70 boys, as compared to 227 girls; whilst the idea of "infant baptism" was known to 180 boys as compared to 220 girls. The idea of "pleasure" was also much better understood by girls than by boys. Examination of the memory has also established the existence of differences between the sexes in childhood. In boys the memory for objects appears to be at first the best developed; to this succeeds the memory for words with a visual content: in the case of girls, the reverse of this was observed. In respect of numerous details, however, the authorities conflict. According to Lobsien, boys have a better memory for numbers, words, and sounds. The same investigator informs us that in girls the visual memory is distinctly better than it is in boys, this indicating that girls' memory for objects is also better; but Netschajeff, on the other hand, maintains that boys have a better memory for objects perceptible by the senses. It is interesting to note that certain variations have been shown to exist at different ages. During the first years of school-life, boys' memories are in general better than girls', this advantage persisting up to the age of ten; from this time onwards until the end of the years spent in primary schools, girls excel boys in the matter of memory, but especially at ages of eleven, twelve, thirteen, and fourteen. Later than this, the boys become equal to the girls, and still later surpass them. Very striking is the fact, one upon which a very large number of investigators are agreed, that girls have a superior knowledge of colours. Experimental investigations made by means of Holmgren's test have shown that the superiority of girls in this respect is remarkable, and these experiments are confirmed by other lines of study.

There are additional psychological data relating to the differences between the sexes in childhood. I may recall Stern's investigations concerning the psychology of evidence, which showed that girls were much more inaccurate than boys. I may also refer, on the other hand, in relation to sexual differentiation, to the experiences obtained by Hans Gross by means of observations on practical life, although his results are not entirely free from certain sources of fallacy, and moreover have been disputed by other observers as not generally applicable. Hans Gross, however, found a notable difference between boys and girls, of which I shall later give a detailed description. Here, I shall merely quote the comprehensive summary given in his Criminal Psychology: "My results show that the boy who has passed his first years of childhood is, if well trained, the best observer and witness that can possibly be found, because he watches with interest all that goes on around him, stores it impartially in his memory, and reproduces it faithfully; whereas the girl of like age is often an untrustworthy, and even a dangerous witness. She is inevitably this when, after traversing the stages of talent, ardour, reverie, romanticism, and enthusiasm, she has passed into a condition of Weltschmerz, tinged with tedium vitae. This emotional mental atmosphere is entered at an earlier age than is commonly imagined; and when such a girl's own personal interests are in any way affected by the occurrences under examination, we are never secure from gross exaggeration and misstatement. Petty larceny becomes robbery with violence; a trifling incivility, a serious assault; a harmless pleasantry, an interesting proposal for elopement; and the foolish prattle of children becomes a dangerous conspiracy."

I shall subsequently discuss in detail a psychical difference which is the most important of all those connected with the sexual life, namely, the direction of the sexual impulse, which attracts the man to the woman, and the woman to the man. We shall see to what a considerable degree this phenomenon manifests itself even in childhood.

It has been widely assumed that these psychical differences between the sexes result from education, and are not inborn. To avoid misunderstanding, we must, in our consideration of this question of education, distinguish between two distinct classes of phenomena, those which are individual and those which have existed for a number of generations. The sexually differentiated qualities in any individual may be regarded as inborn, and yet we may admit that the differentiation was originally the result of education, if we suppose that in earlier generations in either sex certain qualities were developed, and that gradually, by monosexual inheritance, the differences became confirmed, until finally they became inborn. Others, however, assume that the psychical characteristics by which the sexes are differentiated result solely from individual differences in education. Stern believes that in the case of one differential character, at least, he can prove that for many centuries there has been no difference between the sexes in the matter of education; this character is the capacity for drawing. Kerschensteiner has studied the development of this gift, and considers that his results have established beyond dispute that girls are greatly inferior in this respect to boys of like age. Stern[17] points out that there can be no question here of cultivation leading to a sexual differentiation of faculty, since there is no attempt at a general and systematic teaching of draughtsmanship to the members of one sex to the exclusion of members of the other.

Without further discussing the question, to what extent in earlier generations there has been any cultivation of psychical differences, I believe that we are justified in asserting that at the present time the sexual differentiation manifested in respect of quite a number of psychical qualities is the result of direct inheritance. It would be quite wrong to assume that all these differences arise in each individual in consequence of education. It does, indeed, appear to me to be true that inherited tendencies may be increased or diminished by individual education; and further, that when the inherited tendency is not a very powerful one, it may in this way even be suppressed. Observations on animals which exhibit sexual differentiation very early in life, also support the notion of the inherited character of certain tendencies; for instance, the movements of male animals often differ from those of the females of the same species.

We must not forget the frequent intimate association between structure and function. This well-proved connexion would lead us a priori, from the more powerful muscular development of boys, to infer the different inclinations of the two sexes. Rough outdoor games and wrestling thus correspond to the physical constitution of the boy. So, also, it is by no means improbable that the little girl, whose pelvis and hips have already begun to indicate by their development their adaptation for the supreme functions of the sexually mature woman, should experience obscurely a certain impulsion towards her predestined maternal occupation, and that her inclinations and amusements should in this way be determined. Many, indeed, and above all the extreme advocates of women's rights, prefer to maintain that such sexually differentiated inclinations result solely from differences in individual education: if the boy has no enduring taste for dolls and cooking, this is because his mother and others have told him, perhaps with mockery, that such amusements are unsuited to a boy; whilst in a similar way the girl is dissuaded from the rough sports of boyhood. Such an assumption is the expression of that general psychological and educational tendency, which ascribes to the activity of the will an overwhelmingly powerful influence upon the development of the organs subserving the intellect, and secondarily also upon that of the other organs of the body. By the influence of the will, it is supposed by this school, certain association-tracts in the brain are developed; or at least certain tracts hitherto functionally inactive are rendered functionally active. We cannot dispute the fact that in such a way the activity of the will may, within certain limits, be effective, especially in cases in which the inherited tendency thus counteracted is comparatively weak; but only within certain limits. Thus we can understand how it is that in some cases, by means of education, a child is impressed with characteristics normally foreign to its sex; qualities and tendencies are thus developed which ordinarily appear only in a child of the opposite sex. But even though we must admit that the activity of the individual may operate in this way, none the less are we compelled to assume that certain tendencies are inborn. The failure of innumerable attempts to counteract such inborn tendencies by means of education throws a strong light upon the limitations of the activity of the individual will; and the same must be said of a large number of other experiences.

It is, moreover, established beyond dispute that in certain cases, in consequence of an inborn predisposition contrary sexual inclinations make their appearance, and that these represent a divergency from the proper sexual characters. It is with these mental sexual differential characters just as it is with the physical secondary sexual characters, any of which may, on occasion, make their appearance in the wrong sex, or may be wanting in the right one. We know that there exist women with beards, masculine larynges, and a masculine type of thorax; and, on the other hand, men with feminine mammae, feminine larynges, and a feminine type of pelvis. Because we meet with such atypical instances, we are not therefore justified in inferring that it is by a mere arbitrary sport of nature that in the woman a great mammary development is normally associated with the development of the ovaries, and that in man the growth of the beard is associated with the development of the testicles. But just as in these respects there are certain exceptions whose origin we are not always in a position to explain, so also are there exceptional sexual associations in respect of the secondary psychical sexual characters. Thus it comes to pass that many women exhibit masculine tendencies, and many men exhibit feminine tendencies. Unquestionably, the fact that psychical qualities, just as much as physical characters, may occasionally make their appearance in the wrong sex, does not invalidate the general truth of the statement that sexually differentiated psychical tendencies are inborn.

Occasionally, indeed, even in late childhood, this psychical differentiation is still but little marked. We must also bear in mind the fact that in many instances the bodily development of the girl--apart, of course, from the actual reproductive organs--differs but little, even during the second period of childhood, from that of the boy; and that in such cases the specific differentiation makes its first appearance later than is usual. We find boys also who have entered upon the period of youth (see page #) without exhibiting any trace of downy growth upon the upper lip or the chin; in some, the first definite growth of hair on the face may not occur until several years later. I remember also that I have seen boys in whom during the period of puberal development an enlargement of the mammae took place, going so far that it was possible by pressure on the glands to expel fluid from the mammillary ducts; at a more advanced age, however, this mammary growth was arrested, and subsequently atrophy ensued.

But all these observations notwithstanding, the fact remains well established that even in childhood notable sexual differences make their appearance. Other observations, too, confirm this notion of sexual differentiation--for example, pathological experiences.

There are some diseases to which women are especially liable, others which occur by preference in men. To some extent, indeed, this is explained by the special exposure of one sex or the other to certain noxious influences. The neuroses that appear as the sequelae of injuries are especially common in the male sex, because the occupations of men expose them more than women to injuries of all kinds. Of such cases, of course, we do not speak here. But there are some unquestionably hereditary morbid tendencies which manifest themselves by preference in one sex or the other, and such sexual predisposition shows itself even in childhood. I propose to give instances of this; some quoted from Möbius,[18] some from other authors, and some taken from my own personal experience.

Chlorosis is a disease of feminine youth, but very often makes its appearance in childhood, especially towards the end of the second period of childhood, at this earlier age, also, attacking girls in preference to boys. Haemophilia, on the other hand, and also certain hereditary forms of muscular atrophy, occur chiefly in males, and this in early childhood. Diabetes is principally a disease of adults, but occasionally it is met with in children also; among adults, there is a considerable preponderance of males affected with this disease when diabetes occurs in childhood, the disease also exhibits a preference for the male sex, although at this time the peculiar sex-incidence is less marked than in later life. Congenital defects of the heart are commoner in boys, the proportion obtained from a very large number of cases of this kind being 61.6 boys : 38.4 girls. Chorea (St. Vitus's dance) affects girls more often than boys, the ratio in this case being 2.5 girls : 1 boy. In the case of whooping-cough, we find that two girls suffer for every one boy. As regards circumscribed facial atrophy, which usually begins during childhood, a preponderance of the disease in the female sex is also noticeable. Hysteria was formerly regarded as a typically feminine disease, and although this view has now been shown to be erroneous, the fact remains that girls and women are far more often affected than boys and men. As regards hysteria in childhood, Bruns[19] states that the ratio of girls affected is to boys affected as 2 : 1. It is interesting to note that in the earlier years of childhood, prior, that is to say, to the age of nine years or thereabouts, no marked difference exists in the sex incidence of hysteria, the cases being distributed in the proportion, 55 per cent. girls, 45 per cent. boys; but after the age of nine, the proportion of girls affected with hysteria increases, while that of boys diminishes. Eulenburg,[20] indeed, records 17 cases of hysteria, affecting children at ages nine to fourteen years; of these nine were boys, and eight girls. Clopatt, on the other hand, collected from the literature of the subject 272 cases of hysteria in young children, 96 being boys, and 176 girls. Typhoid is commoner in males; and Möbius lays stress on the fact, which he regards as especially striking, that the difference in the sex-incidence of this disease is manifest even in childhood. As regards colour-blindness, there is a notable preponderance among males, and since we here have to do with a congenital affection, this preponderance is as marked among children as among adults. Many defects of speech also exhibit a notable difference in their sex-incidence. Hermann Gutzmann[21] has shown that in the case of stammerers we find 71 per cent. boys and 29 per cent. girls. I take this opportunity of referring briefly to the fact that, as Max Marcuse[22] reports, certain diseases of the skin exhibit sexual differentiation of type even during childhood. The disseminated cutaneous gangrene of children is far more frequent in girls than it is in boys; Broker, among twelve cases, found ten girls. Alopecia areata, on the other hand, affects both sexes with equal frequency, but affects them at different ages. Whereas during the first years of life girls are more frequently attacked; when the age of twenty is passed, the relation between the sexes in this respect are reversed.

Criminological experiences appear also to confirm the notion of an inherited sexual differentiation, in children as well as in adults. According to various statistics, embracing not only the period of childhood, but including as well the period of youth, we learn that girls constitute one-fifth only of the total number of youthful criminals. A number of different explanations have been offered to account for this disproportion. Thus, for instance, attention has been drawn to the fact that a girl's physical weakness renders her incapable of attempting violent assaults upon the person, and this would suffice to explain why it is that girls so rarely commit such crimes. In the case of offences for which bodily strength is less requisite, such as fraud, theft, &c., the number of youthful female offenders is proportionately larger, although here also they are less numerous than males of corresponding age charged with the like offences. It has been asserted that in the law courts girls find more sympathy than boys, and that for this reason the former receive milder sentences than the latter; hence it results that in appearance merely the criminality of girls is less than that of boys. Others, again, refer the differences in respect of criminality between the youthful members of the two sexes to the influences of education and general environment. Morrison,[23] however, maintains that all these influences combined are yet insufficient to account for the great disproportion between the sexes, and insists that there exists in youth as well as in adult life a specific sexual differentiation, based, for the most part, upon biological differences of a mental and physical character. I have referred to these criminological data for the sake of completeness, but I feel it necessary to add that their importance in relation to our subject of study is comparatively trifling, since most of the cases in question are offences committed by persons who can no longer properly be regarded as children.

As we have seen, during childhood, and especially during the second period of childhood, there exists a larger number of sexual differences both mental and physical. Some of these are obviously discernible when we compare isolated individuals; others only become apparent when we institute a statistical comparison. And when such differences appear in childhood, we find that they are quantitatively less extensive than the sexual differences of adults. For the sexual life is in the child less developed than it is in the adult. We shall learn that in the matter of the sexual impulse, the child exhibits an imperfect differentiation. A similarly imperfect differentiation is found in childhood in respect of a number of other qualities. Thus, there are many diseases which later in life manifest a sexual differentiation, but in childhood are undifferentiated. We observe a similar age-distinction in respect of suicide, which occurs in Europe far more frequently in men than in women, the ratio among suicides being three or four men to one woman. Among child-suicides there is far less disproportion between the sexes. According to Havelock Ellis, indeed, the suicidal tendency makes its appearance in girls at an earlier age than in boys.

Such a marked differentiation as there is between the adult man and the adult woman certainly does not exist in childhood. Similarly in respect of many other qualities, alike bodily and mental, in respect of many inclinations and numerous activities, we find that in childhood sexual differentiation is less marked than it is in adult life. None the less, we have learned in this chapter, a number of sexual differences can be shown to exist even in childhood; and as regards many other differences, though they are not yet apparent, we are nevertheless compelled to assume that they already exist potentially in the organs of the child.