This wittily illustrated factual-but-fun book provides a lively historical background to sexology - the scientific study of human sexuality - and then paints the 1960s and 1970s in all their glorious detail. How Big is Big? examines sexual history over the centuries and across the globe, from the sexual exploits described in classical mythology and the explicit Indian Kama Sutra, to the restrictive teachings of the Christian church and the study of sex by disapproving reformers in the eighteenth and nineteenth centuries - including John Harvey Kellogg who believed masturbation caused acne, bed-wetting and shyness. The 1960s and 1970s were decades of major legal changes and sexual experimentation that saw a boom in the study of sex, and from there the authors explore the latest decades of research and developments. From birth control to homosexuality, open marriage to sex therapy, this entertaining book offers an illuminating authority and insight into the history of sexology.