Last Thursday, the Wellcome Collection opened the first UK exhibition to bring together the pioneers of the study of sex. The Institute of Sexology: Undress Your Mind fascinates in its examination of the culturally constructed nature of sexual behaviour. Included is a brief history of the pioneering National Survey of Sexual Attitudes and Lifestyles (Natsal). Established by a female team to learn more about sexual behaviour at the peak of the HIV-Aids crisis, its findings in 1990/91 informed successful sexual health strategies. It has conducted three major studies every decade since then. On average, men now have around 12 partners and women 7.7 in a lifetime, double the 1990 figure but hardly Sodom and Gomorrah. “Media portrayal of sex is so different from people’s lived reality,” says Professor Dame Anne Johnson, one of Natsal’s leaders