Two men get in a fight, or at least a highly charged physical confrontation, over a woman they're both attracted to. One of them wins, so naturally she spurns him and goes for the loser. Though the genderswapped version is of course possible, it appears to be rare-to-nonexistent in practice. Authors with traditional views about gender roles probably won't have women in this kind of confrontation, while more feminist writers are likely to shy away from Unfortunate Implications about physically capable women being unattractive. But see Wounded Gazelle Gambit.