“Dude I think you’re super cool but for my own health and safety, I’m kind of particular and want to be with someone with good hygiene. What that means to me is clean clothes, bathed, clean hair, teeth, ears, etc. I don’t really know how else to say it more kindly but you need to work on that if we are going to pull this off.”

Your standards aren’t nuts by any stretch. Maybe he was never taught, maybe he doesn’t have money for a dentist…who knows but it’s a deal breaker for you and would be for most people id hope.