As a professional, educated, attractive female in my 30s, I understand the OP's stance completely, and I also understand the reaction.

So many women equate a partner having sex with someone else as the ultimate abuse of trust, but what they don't realize is that they're actually less concerned about "losing trust" than they are about losing face.

Your spouse could rip the head off of a small animal and you wouldn't make noises about leaving him. But the second the neighbors find out he found some nookie from a hotter woman, that's an attack on your ego.

Humiliation is far more "abusive" to women of a certain ilk than losing this imaginary trust. Become someone I didn't know you were and I can handle it, they seem to say. But make me think I'm not as attractive as someone else, and it's off with your nuts.