The second best thing you can do with your mouth
January 26, 2011 6:45 PM Subscribe
Smiles are awesome! But what are they? Which ones make you more attractive? Who fakes them better - and how good are you at spotting a fake one (previously)? Do they spread through social networks? Does smiling make you feel better when you're down? Will they predict you living longer or having a happier marriage? If all else fails, at least a smile might make you better at gambling.
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