WEIRD NEWS
09/09/2013 01:11 pm ET Updated Sep 09, 2013

5 Shockingly Violent Back Stories Of Everyday Traditions

Chances are you've never even given a second thought as to exactly why it is we, say, cover our mouth when we yawn, or shake hands when we meet someone new. You do it because some grownup told you to, before you were able to comprehend how random and pointless it all is.

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