Adolescence is also characterized by physical changes, new emotions, and sexual urges, and teenagers are likely to participate in sexual activity . A longitudinal study done in 2012 followed a group of adolescents for thirteen years. Self-reports, peer nominations, teacher ratings, counselor ratings, and parent reports were collected, and results showed a strong correlation between deviant peer groups and sexual promiscuity . Many teens claimed that the reasons for having sex at a young age include peer pressure or pressure from their partner. The effects of sexual activity at a young age are of great concern. Pregnancy and sexually transmitted diseases are only a few of the consequences that can occur. 
A couple of weeks ago just a short distance from my home, a nineteen-year-old kid at a party accidentally shot his seventeen-year-old friend in the stomach with a sawed-off shotgun that someone else had brought to a party. (I don’t want to get into the underaged drinking nor what a seventeen-year-old girl was doing sixty miles from home at 11 o’clock at night.) The shooter, although not a model citizen with a perfect past, immediately recognized what he’d done and himself placed the 911 call. He’s been charged with second-degree murder. My heart goes out to him. She was a friend. He was, if the stories are true, goofing off. This study makes a good case for manslaughter or perhaps even a lesser charge for him.