Book excerpt: Becoming sexually involved with another person is a big step in your life. It’s something to think about on your own long before you have to make a decision with anyone, even the partner you love deeply. It is probably one of the most important decisions you’ll ever make. Sixty-seven percent of sexually experienced teens say they wish they had waited longer before having sexual intercourse. Through case studies and information from experts, Safe Sex 101 provides the overview teens need to understand abstinence, contraception, sexually transmitted diseases, and unplanned pregnancies, and how these can affect their lives.