(2). Compensatory masturbation is very common and ceases with the opportunity for normal coitus.
(3). Sodomy is also often compensatory.
(4). It is the same with assaults on children, which seldom depend on a hereditary disposition.
(5). Lesbian love, a form of degeneracy, artificial excitation of the clitoris by the tongue or otherwise, may have quite a different origin than from sexual inversion or other perversions.
All these things take place chiefly in brothels or with prostitutes, in barracks, boarding-schools, convents, and other isolated places where men and women live alone and separated from the other sex.
Sadism, masochism, fetichism and exhibitionism are much more rarely the result of habits, because their object and the images with which they are associated do not offer compensation for the normal excitation of the sexual appetite, or only do so insufficiently.
I am here obliged to contradict Krafft-Ebing, who regards exhibitionism as the effect of the impotence of certain individuals depraved by excesses, or as the unconscious act of certain epileptics. No doubt the two conditions which he mentions may present themselves, but the exhibitionists I have observed have all been psychopaths whose perversion was primordial and hereditary, with the exception of some females in whom perversion originated in suggestion or alcoholism, which had at any rate aroused the disposition.
Lesbian love merits special mention. Owing to the clitoris being more or less concealed, women are often not satisfied by coitus, especially when the ejaculation of the male takes place too quickly. Consequently a number of normal women prefer to procure an orgasm by means of lesbian love (cunnilingus.) There are clubs of female perverts, many of whom are not homosexual by heredity.
Although they differ from hereditary perversions, acquired perversions are connected with the former by a series of latent hereditary dispositions, more or less marked, and often difficult to distinguish in particular cases, especially when suggestion is blended with them.
Among the entirely hereditary and congenital sexual perversions, many occur in individuals who are well conducted and often possessed of delicate and altruistic sentiments. This point is not sufficiently recognized. Such persons are nearly always more or less neurotic in other respects. They are disheartened by their perversion and are so much ashamed of it that they often prefer to carry their secret to the grave rather than confide it to their doctor.