I would NEVER allow this. Although I would expect my teen to probably be having sex with her boyfriend if she's been with him a while, that doesn't mean I'm going to make it easy on them! I don't think kids should be allowed to have their bf/gf over for as long as they're in high school. When they're older and in college, I think it would be okay to let them stay in the same bed if they'd been dating for quite a while, but if not I would insist on separate beds (even though that probably wouldn't stop them). When my child is an adult, on her own, and completely supporting herself, then I'll throw the "separate beds" rule out the window, since it seems silly to make two independent adults sleep in different beds.Just make sure to tell your daughter to NEVER move in with a man until she's got a ring on her finger and a deposit at the reception hall. You're a guy, so you know what guys really want when their girlfriends move in... easy access to sex, regular company, someone to pay half the bills, and probably keep things clean. AKA, all the benefits of a wife without the committment.