How is this comfortable?

I just don't understand how kids can wear their underwear backwards! I tried to turn it around for Kellen, but he refused (Skylar did the same thing at this age). At least he is wearing underwear. He is going through a hard core naked phase. I just can't keep clothes on him (at least it is just at home--he does keep his clothes on at school and when we go to the store:))!