Hell, couldn't this guy just quit all this evil and sell this talent. There must be a ton of people that would pay a premium price to be deaged, even if it was temporary.

I can even imagine sweet ways he could do this by deaging elderly couples (…who have a lot of money- obviously) so they can go on a date on the town once again in their prime.

I would imagine Suzi Q would be less pissed at Joseph for…y'know… Part 4… if he took this service.

I was just thinking earlier what would happen if Joseph went with Polnareff instead of Jotaro. Would he age back to his younger self from Part 2 and whoop out a can of good ol' Hamon Energy?