Page:Psychopathia Sexualis (tr. Chaddock, 1892).djvu/398

 development, and by proving the existence of a general neuropathic or psychopathic condition.

The species facti is important; but it allows, however, only presumptions, since the same sexual act, according as it is committed by an epileptic, paralytic, or a man of sound mind, takes on other features and peculiarities, in accordance with the manner in which it is done.

Periodical recurrence of the act under identical circumstances, and an impulsive manner in carrying it out, give rise to weighty presumptions that it is of pathological significance. The decision, however, must follow after referring the act to its psychological motive (abnormalities of thought and feeling), and after showing this elementary anomaly to be but one symptom of a general neuropathic condition,—either an arrest of mental development, or a condition of psychical degeneration, or a psychosis.

The cases discussed in the portion of this work devoted to general and special pathology will certainly be useful to the medical expert, in assisting him to discover the motive of the act. To obtain the facts necessary to allow a decision of the question whether immorality or abnormality occasioned the act, a medico-legal examination is required,—an examination which is made according to the rules of science; which takes account of both the past history of the individual and the present condition,—the anthropological and clinical data.

The proof of the existence of an original, congenital anomaly of the sexual sphere is important, and points to the need of an examination in the direction of a condition of psychical degeneration. An acquired perversity, to be pathological, must be found to depend upon a neuropathic or psychopathic state.

Practically, paretic dementia and epilepsy must first come to mind. The decision concerning responsibility will depend on the demonstration of the existence of a psychopathic state in the individual convicted of a sexual crime.

This is indispensable, to avoid the danger of covering simple immorality with the cloak of disease.

Psychopathic states may lead to crimes against morality,