Im: Human Sexuality 4/E

by William H. Masters

Paperback

First published March 21, 1998

About the author

William Masters and research assistant Virginia Johnson pioneered research on human sexuality. They observed participants in various sexual acts and identified four stages of sexual response. In addition, they treated a variety of sexual disfunctions. The two married and stayed together for 22 years before divorcing.

The Showtime program Masters of Sex is based on the research of Masters and Johnson.