Dr. Richard von Krafft-Ebing wrote Psychopathia Sexualis: eine Klinisch-Forensische Studie (Sexual Psychopathy: a Clinical-Forensic Study, 1886) as a forensic reference book for physicians and judges. Sexual Psychopathy was one of the first books about sexual practices that studied homosexuality; the clitoral orgasm and jouissance, the sexual pleasure of the woman; and proposed consideration of the mental-state of sexual criminals in the legal judgement of their actions. As such, it was the medico–legal textual authority on psychosexual diversity, and a most influential human sexuality book until Sigmund Freud.
The first edition of Psychopathia Sexualis (1886) presents four categories of "cerebral neuroses":
- paradoxia — Sexual desire at the wrong time of life
- anesthesia — Insufficient sexual desire
- hyperesthesia — Excessive sexual desire
- paraesthesia — Sexual desire for the wrong goal, e.g. "contrary sexual desire" homosexuality, sexual fetishism, sadism, masochism, paedophilia.
Major Source: wikipedia