The standard edition of Freud's seminal theory of the psychology of sexuality These three essays -- "The Sexual Aberrations," "Infantile Sexuality," and "The Transformations of Puberty" -- are among Sigmund Freud's most important works. Here, Freud outlines the core features of libido theory, his grand view of the psychology of sexuality: sexual perversion is a matter of human nature and "normal" sexual behavior only appears later in...