Engaged?

So I posted some pictures of my last party on Facebook. One of them had a friend of mine sticking his ass in another girl's face. The catch is that this guy's engaged to another girl. A hot one I might add. And he didn't want his fiancee to see him having fun, so I had to take down the picture.

But all of this seems strange to me. If your girlfriend/fiancee is going to get mad at you for something like that, are you sure you're with the right person? After all, you are who you are.