So whenever me and my boyfriend kiss and he breathes through his nose it smells kinda bad. I looked it up on google because I wasn't sure if it was possible to smell bad breath through someone's nose and I read it that it is definitely possible and could be from his lack of oral hygiene. We're a very new couple and I don't want to hurt his feelings and I also don't know his hygiene habits yet. How do I ask him nicely about his hygiene and how do I get him to make a change?