This paper examines two theoretical perspectives on sexual behavior in Africa using the 1992 Zambia Demographic and Health Survey data on never-married adolescent females. The results offer more support to the rational adaption hypothesis which assumes that many young women may be entering into sexual relationships to obtain money and material goods they cannot get within the financial capital of their families. There are, however, indications that some adolescents are sexually active before marriage as a result of the breakdown of traditional social controls that elders had over the younger people. The way in which this assumption of the social disorganization theory can be further explained is examined under the conceptual model of social capital.