DS (4) is really into fighting. He and DH do loads of play fighting at home which I think crosses a line a bit. But DS has a lot of anger and aggression ('I try to be good but my body just won't listen to me') and DH argues that it's a good outlet. I do see his point on this. But DS has been in trouble a few times at school for fighting now (with the same boy). I don't know what's normal for boys and at home. I don't know whether I should be banning all types of fighting because it seems such a grey area and so confusing for someone so young to be allowed to play fight with his dad but not anyone else? Should I look at channeling it in some other way? Would really appreciate any advice.