Issues with SO about habits

I need advice on how to bring it up that some of the things he does is disgusting and he needs better habits. It’s hard to talk to him because he’s super sensitive and when I get near any subject close to it he gets all depressed and blames himself and apologizes over and over but he’s still not getting that this is a near deal breaker for me. One of the main thing I’m having a problem with is his washing habits. I we took a shower the other day and he didn’t wash his butt or dick and I asked him if he was going to and the response was it’s not like you’re going to suck it anyways. And he butt was are you going to get into rimming? (He’s not into it he was trying to joke) I explained that it’s just unsanitary and he needs to take better care of himself, he brushed it off and I finished quick and jumped out. I’m a bit ocd when it comes to cleaning myself and I swear sometimes I can literally smell him. I’m getting kind of close to thinking about just ending it with him over this.