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462 whom he used to maltreat and knock down. In particular, he recalled an occasion when he struck his brother on the head with his boot until he bled, whereupon his mother remarked: "I fear he will kill him some day." While he was seemingly thinking of the subject of violence, a reminiscence from his ninth year suddenly occurred to him. His parents came home late and went to bed while he was feigning sleep. He soon heard panting and other noises that appeared strange to him, and he could also make out the position of his parents in bed. His further associations showed that he had established an analogy between this relation between his parents and his own relation toward his younger brother. He subsumed what occurred between his parents under the conception "violence and wrestling," and thus reached a sadistic conception of the coitus act, as often happens among children. The fact that he often noticed blood on his mother's bed corroborated his conception.

That the sexual intercourse of adults appears strange to children who observe it, and arouses fear in them, I dare say is a fact of daily experience. I have explained this fear by the fact that sexual excitement is not mastered by their understanding, and is probably also inacceptable to them because their parents are involved in it. For the same reason this excitement is converted into fear. At a still earlier period of life sexual emotion directed toward the parent of opposite sex does not meet with repression but finds free expression, as we have seen above (pp. 209–215).

For the night terrors with hallucinations (pavor nocturnus) frequently found in children, I would unhesitatingly give the same explanation. Here, too, we are certainly dealing with the incomprehensible and rejected sexual feelings, which, if noted, would probably show a temporal periodicity, for an enhancement of the sexual libido may just as well be produced accidentally through emotional impressions as through the spontaneous and gradual processes of development.

I lack the necessary material to sustain these explanations from observation. On the other hand, the pediatrists seem to lack the point of view which alone makes comprehensible the whole series of phenomena, on the somatic as well as on the psychic side. To illustrate by a comical example how one