Who wins this fight?

[duk]

There's no way the woman can win.

There is a rather accurate Seinfeld episode in which Kramer falls asleep on top of his girlfriend, and she is unable to get out. A similar situation could easily come up in the fight, and there is no way a 110 pound woman is pushing a 210 pound guy off of her.

If the guy is for some reason unable to beat the crap out of her with his shoulders and legs, all he has to do is knock her down and get on top. She won't be getting out. Give it a shot with your lady-friend; lie on top of her as dead weight - you don't even have to grab on - and see how easy it is for her to get out.