The guy fucks a girl while she is passed out. While fucking her hard he slaps her ass and tits all over as hard as he can until the areas are bright red. Then he cums all over her ass and tits and spreads it into a nice, thin layer taking care to cover the red spots. When she awakes the next morning her tits and ass are sore, red, and appear to be peeling! The reverse of what would happen had she passed out on the beech wearing a bikini!
Don't pass out at a party or you might wake up with a reverse sunburn!