now, it's officially the grooviest hormone on earth because oxytocin's famous. it causes bonding between mothers and infants and pair bonding between monogamous couples, and it makes you more expensive and emotionally sensitive and more cooperative and more charitable and more trusting, and there's a whole new horrifying field of neuroscience called neuromarketting -- [laughter] where if you spritz oxytocin up people's noses, they're more likely to believe all sorts of gibberish and nonsense of people trying to sell you stuff whether it's their political viewpoint, if they could spray oxytocin through the vents in costco all over this country -- [laughter] what that would do to the economy. so ox to city toe sin promotes pro-social behavior until you look more closely. what recent work shows is that's exactly what it does. it makes you much more cooperative and general rouse and charitable and all of that with people who you categorize as being just like you. it makes you more pro-social towards in-group members. and when it comes to out-group members, it makes