My son's in Uni, but he is more interested in his Tae Kwan Do. He is chopping blocks like crazy with his bare hands. Says it is necessary to earn him his black belt. I'm afraid he might damage his hands. Besides there is all this time wasted practising his kicks and stuff and not applying to his studies. My wife says his getting his black belt is very important to him." So let him be " she says. I think it is all an ego trip. What am I to do?