Earlier quoted context omitted.
Your argument is basically circular reasoning. You say the cultural attitude is based on the unambiguity of violating one's commitments. But the very amount of ambiguity and "wiggle room" we find in marital infidelity compared to corruption, torture, etc... is itself a product of American cultural standards. Culture is self-reinforcing, but you didn't explain why those standards exist, you've just shown how they get…
There's no such thing as a legal open relationship. Maybe there should be. I think the world would be a happier place if people who aren't naturally monogamous didn't have to pretend to be - to themselves, or to anyone else. The space in that place is a natural sticky area for sociopaths who enjoy lying and hurting people. Making "poly" an explicit orientation would make that space smaller and save everyone a lot of…
Can you tell me which law an open relationship would be breaking in the state of Oregon?