C.M.
Good for you for tackling this subject! I don't have teenagers but I volunteered at a pregnancy clinic and I know that they get younger all the time. So definately don't wait. First I would say that pre-teen to teen just want to be treated as adults. It doesn't mean that you give them full range but approching them as if they aren't "kids" anymore is great. Also direct, honest questions are the best route. You can always ask what they hear at school. They will be more honest with you if you don't aim the question directly towards their actions. Your believes about sex will highly influence them. Tell them that it is ok to wait and talk about STD's and pregnancy. Truely putting aside any judgements will definately lead to more open communication down the line.