who said anything about sex? i wouldnt want to be sitting on a couch that somebodys dirty ass has been on personally.
it’s just as appropriate for an adult to walk around naked as it is for a child. would you be ok with your husband or wife walking into the room naked while you have company?
An adult may have different intentions. They may doing it to intimidate (flashers) or to titillate or they might just enjoy it. I don’t ascribe nefarious intent to a five year old running around their house naked.
Sweet jesus, this is the funniest thing I’ve ever read on the internet.