Here's good news for American parents. A youth survey by the Centres for Disease Control and Prevention (CDC) has found that lesser numbers of high school students are reporting sexual intercourse smoking or fighting episodes compared to earlier findings. According to the Youth Risk Behaviour Survey (YRBS) in 2013 46.8 percent of teenagers in grades nine to 12 have had sexual intercourse - unchanged since 2001. In the 1990s the same survey found 54 percent teenagers were involved in sexual intercourse. Cigarette smoking among high school students has dropped to 15.7 percent the lowest in 22 years. Nearly 25
