Is There A Scientific Explanation For Guy Code?

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You can watch “Guy Code” on MTV2, but–like oxygen and gravity–you can’t actually see Guy Code. It might be invisible, but its ancient rules (such as keeping your hands off a buddy’s girl) are built deep into our DNA. We don’t mean that metaphorically; a new study from the University of Missouri suggests there’s actual scientific evidence:

“[M]en may actually be less attracted to their friend’s wives than other attractive but taken women who are dating strangers. … Mark Flinn, professor of anthropology in the College of Arts and Science [says] ‘Men’s testosterone levels generally increase when they are interacting with a potential sexual partner or an enemy’s mate.’ But when men were interacting with the spouse of a friend, their testosterone levels dropped. If men’s bodies have cock-blocks programmed into their systems, then maybe Bro Codes aren’t just laughable Urban Dictionary fodder.”

MORE: “Do We Need Bro Codes?”

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