I think it works for some couples, but it should definitely be a more socially acceptable preference. Problem is, even people who agree on open relationship often end up being jealous and bitter about it. Jealousy is really hard to get out of the picture no matter what, is it such a strong human emotion.
Holy shit I thought I was the only one. Monogamy is far and away the most toxic force in almost every relationship. It literally does nothing but breed jealousy and suspicion.