I don’t. But I am a little frustrated that he hasn’t acknowledged/discussed it with me. like, hey you might notice me stutter, it’s because X, sometimes Y makes it worse but it gets better by doing Z. Obviously the other person notices, a lot- so why not just address it proactively? This is just awkward now that he won’t discuss it and I have to do all kinds of mental gymnastics to figure out what’s going on and if/how to bring it up.