I think this is true: you cannot comprehend thinking like this. That’s a good thing!
Remember, rapists aren’t desperate for sex. Most have sexual partners. Someone like this jerk, even if he didn’t have a specific girlfriend at the time, was a good looking Olympic-bound athlete at a premier school. There were probably at least one or two young women who flirted with him at that party. He could have had sex that night if he wanted to. But instead, he chose to follow someone who couldn’t consent and rape her.
I think the fact that it would have been known at the party that she wasn’t a student there might have been part of the reason he went after her. He probably figured that she wouldn’t have a snowball’s chance in hell of getting him in trouble…which is absolutely true, except for the fact 2 male graduate students stepped in to protect her.