In a world where seemingly every physiological foible is being reclassified as a disease or an addiction (looking at you, husky sex addicts) it was really only a matter of time until the biological mechanism behind assholism surfaced. As this documentary by December Works explains, it's not your fault that you're a poorly-socialized, narcissistic, self-serving little prick (unless you're Justin Bieber). It's genetics.
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