You know what you fucking do with these horny kids? You throw cold water on them by inviting an RN to class (like me) who will bring them hundreds upon hundreds of pictures of the worst cases of infected dicks and twats, a nice film of a 10lb baby destroying a twat, a dude in jail for non-payment of child support or statutory rape.
You know, the fun stuff. Then I'll pass out boxes of condoms and show them how to test for defects. If they still want to fuck after that, god bless em.