But they have never had this discussion before. That is the difference.

Exactly. They never had the discussion before.

She flat out said she wants to fuck another man. She told her fiance, without ever having had a conversation about threesomes or open relationships, that she WANTS to fuck another man.

Look. I am a strictly monogamous guy. I have no desire to be in a relationship with someone who wants threesomes or wants an open relationship. And if over the course of a relationship, the woman I am dating decided that her desire to fuck other people was so strong, that she came up to me without ever having broached the subject and said this is something she WANTS...I'd be out.

There are simply some incompatibilities that communication and compromise can't work through. There is no way I could look at a woman every day knowing that deep down, I was never going to be enough for her.

Clearly, you do not feel the same way...and that's ok. But that doesn't give you a right to tell other people that feeling that way, and having hard dealbreakers is somehow wrong.

This is something that Rob and his ex should have discussed BEFORE she said this is something that she definitely wants. But they didn't. She dropped this bomb on her relationship and it blew up in her face. Shit happens.

Just because you disagree does not mean Rob is wrong...it just means you disagree. Sometimes, love just does not conquer all.