He is always smacking other peoples bottoms or pinching them. I was very worried but have noticed that 3 or 4 of the others he plays with at school are like this. Today his sister said that he had touched her bottom. I've told him that the parts of the body that are inside pants and knickers are privates you shouldn't touch others and no one else should touch yours. I asked him if anyone else had touched his and he said wel x x x xand x at school are always smakingthers bottoms it seems to happen when they are playing rough and tumble games too.
I don't want to over do it and make him so worried I scar him emotionally IYSWIM but I'm also scared that he is trying to find out what other peoples 'bits are' any advice gratefully appreciated