Just like in Pearl Harbor, Ben Affleck would beat up his best friend if he slept with his girlfriend in real life.

In Michael Bay's WW II-drama, Ben and Josh Hartnett have a confrontation over Hartnett's relationship with Kate Beckinsale.

"Like in the movie I would give my best friend a good slapping. But seriously, I really wouldn't know what to do. I'm glad to say that such an experience has never happened to me yet. It is tough when your best friend sleeps with your lady.

My best friend Matt Damon wouldn't do such a thing. But the first thing I'd ask him if he did would be, 'Wow, Matt! Are you straight?'"