I don't think it needs to be "straightened out". Leave the kid alone and let him be what he wants to be. If he doesn't like it five years from now (highly likely) he'll change. And like most people who change between 15 and 21, by the time he's 25 he'll probably regret some of the choices he made vis-a-vis body modification, or even just fashion statements that are now commemorated forevermore in dad's photos. But the surest route to destroying a relationship between a parent and child is to try and force "your" way on them (and that goes both directions, not just parents trying to make kids be what they want them to be instead of what the kid wants to be). I'm not saying never say NO to the kid, but don't drop ultimatums on them. Do that when it doesn't count, and when it does, they'll choose the option you don't want them to.