Eeeeww! Boys have cooties! Ever say that when you were little? In reality, boys don’t have “cooties.” But what DO they have? When is the best time to have sex for the first time? What if you have sex too young? Who hurts more after a breakups, males or females? What makes girls fall in love? How do boys fall in love? Learn the answers to these questions and more in Teen Girls & Sex: Why Wait? I & II. The Female Adolescent Guide to Sex and Dating.