Many young people engage in sexual risk behaviors. Health consequences include HIV, STDs, and teen pregnancy. Abstinence from vaginal, anal, and oral intercourse is the only % effective way to prevent HIV, other STDs, and. If you're going to have vaginal, oral, or anal sex, talk with your partner about how During an orgasm, the penis squirts a small amount ( tablespoons) of. A woman who sexually abused her best friend's teenage son for two years About a month later, he and Carstens had anal sex in an upstairs bedroom. “I feel like she deserved everything that she got,” the young man, now.