A set of 20 codes measuring a variety of sexual attitudes and practices, along with ratings for each code on 200 human societies was presented. The codes were developed for a long-range study on styles of male-female attachment. The goals of the study were to examine the patterning of opposite-sex relationships in cross-cultural perspective and to isolate any social structural or psychological antecedents that might help to explain variations in heterosexual relationships from 1 culture to the next. Hypotheses relating to these 2 goals were tested and an attempt was made to make the full set of codes and ratings on sexual attitudes and practices available to researchers interested in the cultural management of human sexuality. The purpose was to extend the body of cross-cultural data on sexual beliefs and behaviors rather than to propose any theories or test any hypotheses concerning the cultural handling of sexuality.