Richard von Krafft-Ebing

Richard von Krafft-Ebing was a German scientist who lived from 1840 to 1902. He studied how people behaved and thought, and wrote about it in books. He is most famous for writing a book called 'Psychopathia Sexualis', which talked about different kinds of sexual behaviour, including homosexuality. His book was one of the first to talk about these kinds of topics, and was very influential in how people understand sexuality today.