Blowing one's nose doesn't seem so terrible to me, but custom varies from land to land, I suppose. In Germany, apparently it's not so polite to snort (you know, instead of blowing things out, "sucking things in").

I do wish the numerous Youtube video makers would clear their sinuses & throats before hitting REC. We really don't need the extra noises during the taping.

The Afrin addition is fascinating.