@hanhaiwen generously remembered the most popular SocImages post of all time when coming across this insightful observation at 9Gag.  Thanks Helga!
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Lisa Wade, PhD is a Visiting Scholar at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming Introduction to Sociology text. You can follow her on Twitter, Facebook, and Instagram.