Virginia Johnson was an American sexologist and a key figure in the field of human sexuality. She is best known for her work alongside William Masters in the 1960s, where they conducted groundbreaking research on sexual response and behavior. Their collaboration led to the development of the Masters and Johnson model, which significantly advanced the understanding of sexual function and dysfunction. Johnson's research included the observation of sexual activity in a clinical setting, which helped to debunk many myths surrounding human sexuality. She co-authored several influential books, including "Human Sexual Response," which provided valuable insights into the physiological and psychological aspects of sexual experiences.