During the teen years, you may be strongly attracted to another person. Your body may send you messages that make you want to get closer to that person. But your body won't tell you how having sex now may harm you.
Young girls are more likely to have problems during pregnancy.
Babies of young teen mothers are more likely to be born with serious health problems. STDs may cause pain. They may cause sterility. Some are incurable and some may even cause death. So think before you act.