I appreciate the effort shown

It’s not a fetish, it’s not sexual. Also stop kink shaming me.

Therapootic!

The Bible, for all its faults, is still a record of human thought. Sometimes even wisdom. “When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.” Not bad advice for this dude. Corinthians 13:11

The fact they have to buy their own special made diapers and not regular depends, because regular depends don’t look enough like children’s diapers, obviously has nothing to do with sex and sexual interest at all.

Sounds masochistic to me. It's not therapeutic to negate the self, and these folks are negating themselves when they abandon adulthood for make believe childhood. You're trying to polish a turd here. Not everything in an everything goes environment is healthy or good.

I hope they get therapeutic nappy rash