Prove that men and women weren't meant to be monogamous? Or do you believe we're just evolutionary automatons who are slaves to our genitals? Are you a single male?
Brad Pitt, and Colin Farrell.
DO NOT make me choose. (Especially seeing as Mr. Pitt is now back on the market! *L*)
Well the vast majority of us are not with our first fate that alone proves that humans are not monogamous. Are you with your high school sweetheart? And yes I am a single male.
Some English dude did a series called, 'The Science of Sex'. It was pretty interesting. The theory of sperm competition was fascinating.