Every woman he approached that night turned him down. The "I am a porn "star"" shtick wasn't flying in that town. His ego was bruised. He then tries to break in to many sororities and fraternities. So instead, he goes after a sleeping woman because she's not saying no. There's also the condom wrapper the girl heard the noise from. So how "drunk" could he have been? Just because he had a few drinks doesn't mean he was falling over himself and passed out on the floor. The I'm drunk excuse is that, an excuse. He's also a man, a former marine, and in good shape. He would need to drink an entire keg for anything to make him that drunk that he wouldn't know what he was doing.