Sorry, the pattern on his shoulder looks a little TOO stylish to be the attack of a scorned woman.
So where did this occur? In her place? Was she still there? Why would she do this then? How did she know it was a one night stand?
This kind of sounds to me like it was a sexy scarification game and he just didn't remember. Plus she was asleep next to him so if she'd actually "attacked" him, don't you think she'd get the hell out of there?
Sounds way too fishy for me. Plus those photos show marks on his shoulders ONLY. How'd she roll him over to get to his back and then around BOTh shoulders? Anyone tried to move a chick who is totally passed out? Not the easiest thing to do and I have a hard time believing a woman could manipulate a block that way, especially if SHE was drunk too....