Why can't girls pat boys on the head? And how is it possible for boys?

You could say that. Boys may have strong self-esteem, and the head is the most important part of the body. It's hard to say if something goes wrong. Don't touch it casually. In fact, when I was a child, my mother didn't often say that the beginning would make me stupid. Girls shouldn't actually let others touch their heads. It's just that many girls think it's an ambiguous and intimate feeling for boys to touch their heads, so it doesn't matter. In addition, it seems that touching the back of a boy's head is the most insecure.