The literature on sexual behavior, including its characteristics, explanatory factors and consequences, is very abundant. Unfortunately, little or no work addresses the life courses and the influence of cultural and socioeconomic heritage patterns in which sexual activity occurs at the beginning of women's fertile lives. This article examines the sexual behavior of adolescent girls between 2006 and 2018 in Benin through the lens of capabilities. Data from the last three (03) Benin Demographic and Health Surveys (DHS) conducted between 2006 and 2018 were used to identify factors associated with early sexuality among adolescent girls in Benin.The variable explained was first early sexual intercourse. The discrete-time logistic regression method used led to the results that, taking into account the effect of duration and timing variables, the factors associated with early sexual debut in adolescence are residence in the departments of Atacora/Donga and Alibori/Borgou; low level of schooling or lack of schooling; and membership in a religion of Muslim and Christian persuasion. Taking into account the standard of living of the households and the activity carried out by the adolescents, it is noted that adolescents living in an environment of average standard of living have significantly different sexual behaviors from other adolescents in recent years. The risk of early sexual debut is greater in this social group, all other things being equal. Social position, educational background, and cultural identity are among the factors that influence adolescents' ability to manage their own sexuality.