Yipes ! That is not good.
Maybe get some booklets from your dentist that shows rotten teeth with gum disease etc…and show him what can happen if he doesn’t take his teeth seriously.
There is a saying that goes “If you neglect your teeth today, they will leave you tomorrow”

My boyfriend is the same way, but my solution is threatening to not kiss him. Or if you do anything more than kissing you could threaten to take that away. But other than that I’m not sure what to do. Just get really mad and not talk to him or something lol.

Well not to rain on your parade or anything, but that is extremely unhealthy. I HONESTLY think, hygiene is a very important thing. So if I were you, I’d….break up with him. I Know that looks dont really matter, but still, thats not healthy. I hope I helped!
good luck

Do you really want or need this person as a boyfriend? Poor dental hygiene bodes ill for other personal characteristics. Surely there are better fish in the sea.

You wont need to worry about it when his teeth fall out.

id dump him…eww. when was the last time he went to the dentist????