As we have already stated, individual differences in the sexual appetite are much greater in woman than in man. Some women are extremely excitable, and from their first youth experience violent sexual desire, causing them to masturbate or to throw themselves onto men. Such women are usually polyandrous by nature, although the sexual appetite in woman is normally much more monogamous than that of man. Such excesses in woman take on a more pathological character than in man, and go under the name of _nymphomania_. The insatiability of these females, who may be met with in all classes of society, may become fabulous. Night and day, with short interruptions for sleeping and eating, they are, in extreme cases, anxious for coitus. They become less exhausted than men, because their orgasm is not accompanied by loss of semen. Although in the normal state woman is naturally full of delicacy and sentiments of modesty, nothing is easier than to make these disappear completely by training her systematically to sexual immodesty or to prostitution. Here we observe the effects of the routine and suggestible character of feminine psychology, of the tendency of woman to become the slave of habit and custom, as well as of her perseverance when her determined will pursues a definite end. Prostitution gives us sad proofs of this fact. The psychology of prostitutes is very peculiar. Attempts to restore them to a moral life nearly always fail hopelessly; it is rare to see them permanently successful. Most of these women have a heredity of bad quality and are of weak character, idle and libidinous. They find it much easier to gain their living by prostitution, and forget their work, if they have ever learned any. The poverty, drunkenness and shame which follow seduction and illegitimate birth have no doubt driven more than one prostitute to her sad trade, but the naturally evil dispositions of these women constitute without any doubt the principal cause. Alcohol, venereal diseases and bad habits, combined with continually repeated sexual degradation, afterwards determine progressive decadence. Some of these women, however, of better quality, only surrender themselves to prostitution by compulsion; they suffer from this existence and strive to escape from it. The grisettes and lorettes[2] form a group intermediate between prostitution and natural love; they are women who hire themselves for a time to one man in particular, and are maintained and paid by him in return for satisfying his sexual appetites. Here again, sexual desire only exceptionally plays the chief role. The conduct of these women results from their loose character and pecuniary interest.