At 15, your child still needs plenty of guidance. You are responsible (legally!) for this youngster at this age, so don't feel shy about insisting on a few ground rules. One good one is that he should still be asking permission to go places and particularly to stay out overnight. You do need to know where he is for safety reasons and if, Heaven Forbid, anything happened that required police intervention, you would want to be able to let an officer know what part of town your son was in, who he was with and so on. In fact, grownups give each other details about their whereabouts for the same reasons. It is also a matter of courtesy for people living together as a family, to let each other know where they'll be (at least a general direction) and when they'll be returning. As for your son's "all nighters" - is he functioning alright at school? Is he able to get up in the morning? Is his mood pleasant enough? If he seems to be able to function on the occasional missed night of sleep, there is probably no reason to send him to bed. However, if he does this too often then his functioning will surely decline. As it does, you can tell him that he will not be able to have the privilege of being on the computer. Keep in mind that this IS a privilege - not his inborn right! He can have the computer as long as it does not interfere with school and well-being and he can lose it when you see that it is creating a problem. So don't be afraid to stay in charge for a while longer. Soon enough this young man will be completely grown up and on his own; continue to help him achieve his potential by setting appropriate limits and restrictions while you still have some parenting power left!  Sarah Chana