The other day I went to the dentist, and they had me fill something out that, amongst other things, asked me if I had a history of nail biting, mouth breathing, hard swallowing, or biting hard objects.
What the… why yes, sometimes when I’m stressed, and I just need to get rid of some of that tension, I like to sit around and breathe exclusively through my mouth. There’s just something about bypassing the nose that really lets me relax. If that doesn’t quite do it, I swallow my saliva for a few minutes. But not just a normal swallow. A really hard one.