Do that many people have really bad nasal issues, and that's why they need to spend so much time running bathroom sink water to clear everything out?

I hear people in the bathroom running the sink tap water for at least 5-10 minutes straight, along with snorting and spitting and splashing around. What's going on in there!!!

Do that many people have really bad nasal issues, and that's why they need to spend so much time running bathroom sink water to clear everything out?
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