While the Showtime series “Masters of Sex” dramatizes Masters and Johnson’s groundbreaking sex research, it is worth noting that many others preceded them in studying sex. Sexology has many pioneers from Parent-Duchatelet’s report on prostitution in 1837 through the Kinsey Reports of 1948 and 1953, with Krafft-Ebing, Freud, Hirschfeld, Ellis, Mead, and others in between.