We don't measure it - I don't see this turning into a scientific study. I'm not suggesting that one party should be subjected to continued suffering when they'

We don't measure it - I don't see this turning into a scientific study. I'm not suggesting that one party should be subjected to continued suffering when they're bound to a selfish person either. This is a definite down-side to societal pressure. The other somewhat related topic is abuse victims. Even without societal pressure, they'll often convince themselves they deserve it and stay with their abuser.