Really?

I feel so naive sometimes I don't know what to do with myself.
The scene: A party.
The speaker: A gorgeous young woman. Tall. Centerfold body. Pretty face. "Men cheat," she says. "that's what they do." I've gleaned from the previous bits of conversation that her ex-husband is a producer. She has a couple of kids with him, and they're not exactly divorced. Separated, but they live in the same house or something like that...sort of.
I hear this and think, "What if?" What if people were honest and then just coped with the honesty? What would that mean? In my particular situation. I can't quite imagine it. Would Mr. Ex have treated me better if  he could have had his new young thing and me and I'd said, "Well that's what men do..." I don't know. But I do know I wouldn't have wanted that.
Lack of imagination bothers me. Imagination is key. Now that I've been cut loose, I imagine my future with  many different scenarios. But accepting a cheating man isn't one of them.  But then it's not quite cheating if you admit to it up front. Still, I don't like the idea. Not one little bit.
And I don't really believe that's "what men do..." unless they are crazy Hollywood producers, or sheiks, or are part of Mr. Ex's law firm.