Male Baldness Info

Lately, I’ve noticed that every time I see a boy or young man (with a shaved head) and even occasionally a very grown man,… Getting “Slapped up the Side of the Head” By a parent, mom or dad, a girlfriend, and even a wife. These boys/men, instantly turn a shade of Pink or Red, unless they got a good tan – in which case they turn a shade of Purple. First perhaps out of embarassment and also from anger, at being deciplined in such a way.
It may not have been a good idea to Shave their heads, because, your hair gave those slaps a kind of padding that before you only felt it.
But now, especially with little boys and Teen boys, getting slapped in public by their parents – You can hear the Slap from accross the mall or the store you are in.
Once I was in line for the check-out and heard a slap that made me jump and looked behind me, this poor guy got slapped behind the head by his mom and then his dad, he turned beet red, then his girlfriend or Sister I suppose. Poor Guy -

This question struck me yesterday. I was trying to think of evolutionary(logical) explanations but I couldnt think of any. Much heat escapes through our head and not our face so why is that as we grow older we experience a high rate of baldness among males?