Alfred Kinsey (1894-1956) was a hugely influential sexologist, whose investigations during the 1940s and 1950s did much to broaden our understanding, and foster tolerance, of the human range of sexual tastes and experiences. It is argued that he played a great part in the sexual revolution of the 1960s. Widely regarded as the father of sexology, he founded what is now called The Kinsey Institute for Research in Sex, Gender and Reproduction. He published Sexual Behaviour in the Human Male in 1948 and Sexual Behaviour in the Human Female in 1953. Both became bestsellers.