The field of sexual behaviour has been notoriously neglected in social research and there has been no major survey of sexual behaviour since the Kinsey report in the late 1950s. Various social and health problems, including the AIDS epidemic and the increase in teenage pregnancies have recently underlined the need for an up to date and authoritative analysis of current sexual behaviour. Sexual Attitudes and Lifestyles is the result of a major statistical survey of the sexual behaviours and attitudes of 20,000 UK citizens, collected by written questionnaires and face to face interviews. It is the most comprehensive and up to date source of information on human sexual behaviour available and the first official UK-based resource ever published.