Three Contributions to the Theory of Sex

According to Wikipedia: "Three Essays on the Theory of Sexuality (German: Drei Abhandlungen zur Sexualtheorie), sometimes titled Three Contributions to the Theory of Sex, is a 1905 work by Sigmund Freud which advanced his theory of sexuality, in particular its relation to childhood... Sigmund Freud (May 6, 1856 – September 23, 1939), was an Austrian neurologist who founded the psychoanalytic sc...