Kind of along the same line...
I was in the locker room at the local Y getting ready for my shower. Some chunky 10-11 yr old boy said "you should put some clothes on." I kindly explained that it was a men's locker room adjacent to the showers and that I was changing clothes. He told me, again, "you should put some clothes on." I told him to go talk to his Daddy. No, I wasn't being obscene - I wrapped a towel around me, and didn't yell at the little fvk. He had a local private school sweater on - guess they don't teach Sex Ed in his class.
Anyway, carry on...