The study of sexual physiology - what happens, and why, and how to make it happen better - has been a paying career or a diverting sideline for scientists as far-ranging as leonardo da vinci and james watson. The researc...The study of sexual physiology - what happens, and why, and how to make it happen better - has been a paying career or a diverting sideline for scientists as far-ranging as leonardo da vinci and james watson. The research has taken place behind the closed doors of laboratories, brothels, mri centers, pig farms, sex-toy r&d labs, and Alfred Kinsey's attic.