We've been having huge problems with DS (nearly 17). We make agreements with him which he always breaks etc etc. He has now said he is going to an all night party that we don't agree with. We have allowed him to stay over with groups of friends etc but he has been out overnight 4 times this week. He just says he is going to do as he pleases. We are reasonable but 5 times in a week is excessive. He is doing four AS levels in a few weeks time and comes home so tired he does not do much work. Any attempts to reason with him end in horrible tantrums on his part.