Can a guy keep himself faithful by jacking up oxytocin?
"A study published Tuesday in the Journal of Neuroscience has uncovered a surprising new property of oxytocin, finding that when men in monogamous relationships got a sniff of the stuff, they subsequently put a little extra space between themselves and an attractive woman they'd just met," wrote the LA Times recently.
The results surprised researchers. They had assumed oxytocin would make all men inch closer to cute females. Instead men in committed relationships moved farther away when dosed with oxytocin (and only when dosed). It's more evidence that pair-bonding is biological not cultural.