Using responses from questions about age at first sexual intercourse a
nd age at first marriage, this paper offers a method of studying prema
rital sexual behaviour in societies where the subject is a taboo topic
. More than half of the currently married women in Kinshasa engaged in
sexual intercourse before marriage. The likelihood of having premarit
al intercourse increases among younger women, those with higher educat
ion, and those whose ethnic groups have liberal attitudes towards sexu
al conduct. The results also suggest that sexual activity accounts for
late marriage.