It happens, etc., etc., it'll happen again. I think we're happy with blaming our desires on our subconscious, mainly because we are jerks. And it's the same for women, really. There's nothing subconscious about wanting to fuck other people.
I don't know what kind of jerk warns his girlfriend that he wants to screw other girls beforehand. I guess it's the loving bf who just fucks them behind their back.
No, a loving bf doesn't cheat in the first place. But he also doesn't express desires for a 3way.
Dude's a dick. He blamed it on her. But she couldn't see that coming? He told her he wanted to fuck other chicks...