Kraft-Ebbing

Richard von Krafft-Ebbing (1840-1902) German psychiatrist and author of [Psychopathia Sexualis]? (1886), a famous study of sexual perversity.

It should be noted that some practices considered as pathological by Krafft-Ebbing, such are homosexuality, are no longered considered as such by modern psychiatrists.

References:

• http://www.wellcome.ac.uk/en/1/awtprerela98n103.html