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.
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.