Studies in the Psychology of Sex, Volume 1: The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-ErotismEllis, Havelock, 1859-1939♥
Studies in the Psychology of Sex, Volume 5: Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in PregnancyEllis, Havelock, 1859-1939♥
Studies in the Psychology of Sex, Volume 3: Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in WomenEllis, Havelock, 1859-1939♥