see, what you don't know is that the cheating girlfriend called the sad-sack-of-shit's friend up and asked him to get him drunk so she could go on that date in the first place. the friend agreed to it because he wants to sleep with her, but wants to make sure they're broken up first. so, he takes his friend to where he knows they'll be so he can see it, pushing through the whole process.

guys are generally fairly naive when it comes to how they understand women...