The purpose of this article is to adopt a theoretical perspective to explain why adolescent girls engage in sexual intercourse at an early age. Because the increasing rate of sexual behavior in girlhood nowadays, and the adverse effects adolescent sexual behavior may cause, including teenage pregnancies, drop-out from school and sexual victimization, it is necessary to have a better understand about precocious sexual activity. Accordingly, we introduce a contingence hypothesis of sex-caused from the comprehensive perspective integrating both Adler’s Theory and Resilience Theory. The perspective also suggests that a recreational model is plausible to foster resilience for at-risk youths. Therefore, applying the recreational model, we implemented a sex prevention program adopting poker games. Further suggestions are also listed at the end of the article.