Reading through this article and comment thread makes me feel like I should be using a throwaway account to admit that I've been worried for years about the pro

Reading through this article and comment thread makes me feel like I should be using a throwaway account to admit that I've been worried for years about the proportion of time I breath through my mouth due to feeling that I don't get enough air through my nose. This sentence, "Every participant practiced becoming familiar with oral breathing until the participants could naturally switch their breathing pattern from nasal breathing" made me feel like I must be an alien. I will say however that there are a fair number of comments in this thread that are not really up to the standard I'd expect from HN. I'm quite intrigued to see "mouth breathers" referred to in such derogatory terms. What kind of social indoctrination has triggered that response?