Psychopathia Sexualis

Psychopathia Sexualis: eine Klinisch-Forensische Studie ("Sexual Psychopathy: A Clinical-Forensic Study", also known as "Psychopathia Sexualis, with Especial Reference to the Antipathetic Sexual Instinct: A Medico-forensic Study") is a 1886 book by Richard Freiherr von Krafft-Ebing and one of the first texts about sexual pathology. The book details a wide range of paraphilias, and focuses on male homosexuality (the "antipathetic instinct" of the subtitle). Krafft-Ebing also coined the terms "sadism and masochism" in the book.
The "Psychopathia Sexualis" is notable for being one of the earliest works on homosexuality. Krafft-Ebing combined Karl Ulrichs' "Urning" theory with Bénédict Morel's theory of disease and concluded that most homosexuals have a mental illness caused by degenerate heredity. The book was controversial at the time, arousing the anger of the church in particular.
The book had a considerable influence on continental European forensic psychiatry in the first part of the 20th century. It is regarded as the definitive text on psychopathology.
In 1982, experimental noise band Whitehouse titled their seventh album after the book. In 2006, an independent film based on the book was made in Atlanta; the film was titled "Psychopathia Sexualis".