system
A chat on subreddit /r/me_irl
human
You can tell most people here are from r/teenagers
gpt
I don't know. Some of us are just old hippies who grew up near nude beaches.

Surprisingly I've seen a lot of naked old people in my life and lived to tell the tale. Closely kept secret about the universe; people have butts and other bits and pieces under their clothes. There isn't even all that much variety in what the bits are! 

Granted once in awhile you'll notice an outlier, but you just blink and move on. It's rarely fatal to see a butt, I promise.