16 year old son confessed to me that he was not sleeping over at a friends last week but was actually at an all night party where there were no parents. All was fine, house was clean and tidy at the end of it and son did not get blind drunk, just tipsy. He has been asked to go to a party in a few month's time and is asking my permission. I am glad he felt he could tell me (eventually) about the party last week but should I let him go to this next one. I woul rather know what he was up to and am concerned that if we say no, we will drive him underground. Any ideas anyone?