comment: >
  
  I honestly fail to see how it's considered impolite to not "bless" someone after a normal everyday bodily function. It seems obvious that it started from some religious superstition and I'm neither religious nor superstitious. It's truly a confusing thing to me.
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  If you mean people who cover their nose with their arm/sleeve/tissue/etc., then sure. People who don't are unhygienic, disrespectful, and impolite.  
  Saying "bless you" isn't exactly polite to everyone. It's  quasireligious, and these days, that's not gonna be taken kindly among a lot of demographics.