Well, my first thought when I read all those posts was, why were they talking about not sending a boy into a men's locker room? What did that have to do with the question? That center has 3 locker rooms, one being a family locker room. THAT'S where the woman should have taken her son if indeed he is over the age of the center's rules.
Also, when I join a center and I see their rules, I have the expectation that people will be held accountable to those rules. Personally, I don't want somebody's 6 year old boys looking at M. naked, period. I joined the center with the expectation that I wouldn't have to deal with that. I have the right to make sure it doesn't happen.
I think my son was 4 years old when his daddy saw him heading upstairs and asked him where he was going. He said "To watch Mommy take a shower." THAT'S when I didn't let my kids in the bathroom with M. or let them see M. naked anymore, LOL! Of ccourse they don't think of sex, but there is a point that we J. don't do that anymore. Child psychologists would have clear explanations about it, I'm sure.
Anyway, you are right that there's a difference in nudity and pornography. It's plenty interesting to take our children to an art museum and walk around in rooms full of naked women. I had to explain to my son that it's art and is okay while he was obviously uncomfortable as a young teen.
I don't know if this is enlightening or not. I J. know I wouldn't put up with someone's older boy in the ladies locker room when all that woman had to do was take him to the family locker room (very selfish on her part, in my view) and that you stop taking showers in front of your little boy when he starts asking to see Mommy take one!!
Dawn