One of the most challenging decisions many teenagers face today is whether to engage in sex. In this thoughtful, friendly narrative, teens learn that whatever their reasons are for having sex, it is their responsibility to have safe sex. That means protecting themselves from sexually transmitted diseases and protecting themselves and their partner from pregnancy. Readers learn that the only true form of safe sex is abstinence. They also find out about methods of birth control and their effectiveness. This volume includes an overview of the human reproductive systems and some of the factors that affect the teen body. It also describes various contraceptives and their possible side effects. "Myths and Facts" and "Ten Great Questions to Ask a Doctor" provide additional useful guidance.