I feel like I want to cheat in Monopoly.
It's just a game. Why would you think it's necessary to cheat to win?
I've got a good strategy to win against my girlfriend.
It doesn't make sense to cheat in Monopoly. You are supposed to just be having fun with your girlfriend so why would you want to cheat?
It's just a game. Why do I have to care?
Haha, you also have a good point there. I suppose it doesn't matter since cheating in Monopoly isn't harmful, so I guess your girlfriend is bound to lose. Eventually, I bet she is never going to play Monopoly with you ever again.