Cheater?

I was out with some friends and I brought up how much people had changed in college and how almost all the girls I know have kissed a girl and how I haven't. My friend, instead of giving a normal response, since I was trying to make a joke, said "don't tempt me". I laughed it off but later thought about it... I have a boyfriend and so does she and it seems like it's a usual party thing that guys like. But is that cheating? Even if you do it in front of them to turn them on?