A topic I find incredibly interesting! In my experience, it is for sure a factor, but exactly what’s what and what’s, idk, pheromones or placebo or relaxation aspects or some kind of brain interaction I don’t know. The same goes for sex, which makes it rather ”annoying” in the sense that my speech is much more noticeable worse for the whole day afterwards. A few years ago abroad I had to live with 0 privacy for two weeks, no freetime for any ”release”, and that last week my speech was absolutely the worst it’s ever been. Pure guttural sounds lol