But, all those experiences make us better lovers — if we’re anything like flies, that is. According to a study from Oxford University, male insects with sisters behave less aggressively toward female flies when mating. Okay, yes, this is a study about flies. But we can't help thinking — all this time we've scrutinized how a man treats his mama, when the secret to chivalry might just come down to his sis. Click over to Nerve for the full story.