Oh - I meant - it's something I've seen sometimes, where a stutterer seemingly doesn't have much of an idea that they can share about their stutter, because it's not something that's been reflected on in that capacity. Like, it's not a topic to be elaborated on. It's just something that's there, perhaps to be ignored. Hard to tell in each individual case. - When he swears, does his mood change? I wouldn't call it out of the ordinary to ask someone if they're alright, when they swear out loud, so perhaps that's an obvious "in". - But like, if you are so close... I don't see why you couldn't just ask about it anyway. It's not a thing that close friends can't ask each other about, I reckon.