Both DH and I agree that if they show an interest, rather than forbidding it, we would prefer they try it in our home under our supervision. This way we can control what and how much and should something go wrong there are adults around to help. Both of us have memories of very drunken and dangerous nights being out because we weren't allowed to do so at home - teenagers will be teenages, if theres a will, theres a way. Same goes for smoking and as for boyfriends, they can sleep over (in a separate bedroom and once they prove themselves MAYBE with the door open in their own rooms MAYBE (i'm happy for this to be a long long long way away though!)