I saw recently, on dvd, the biographical movie KINSEY (2004) starring Liam Neeson, and I thought it was very interesting!
Kinsey was a biologist, who shocked the conservative America of the 1940s and 50s, when he studied the sexual behavior of humans and published his findings in his books Sexual Behavior in the Human Male (1948) and Sexual Behavior in the Human Female (1953).
His influense on our culture, and on the sexual liberation that followed, is immense!
Find out more
http://www.imdb.com/title/tt0362269/
http://en.wikipedia.org/wiki/Alfred_Kinsey
http://www.indiana.edu/~kinsey/