[For women] How much love do you have to have for a man to stay with him if he physically assaults and verbally abuse you?

There are a few couples around town that have legendary relationships (as they always put their business out in public). It is no secret that these women get slapped around, it is either witnessed, or the bruises are not convincing as having been done tripping in the bathroom. What is less left to the imagination is the dress-down their men give them in front of people in public, or heard at high level volume while they are speaking privately. How much love do you have to have for a man to endure the name-calling, punches, slaps, and other abuse? Do they love these men that much and that is why they don’t leave, or are they too afraid to go it alone? In other words, would they would rather be with a bad, abusing, someone then be with no one and be single. Does being married make it able to endure treatment like that more than just cohabitation with a lover?