My 17 yr old has discovered sex and his gf, 16, is enthusiastic and rather noisy. His room is such a mess he can't even shut the door properly and relies on the fact that you can't see the bed from the hallway. I'd like to get him to shut the door and keep the noise down so his younger brother does not have to wear headphones. Has anyone managed to have a conversation about this sort of thing? What on earth do I say? Do I tell just him, or both of them? I was thinking I'd just be straight and yell something like 'can you keep the noise down!' but I dont want to embarass them - or perhaps I should. Opinions very welcome!