Oberon-I can understand what you are saying about the abuse becoming expected. I agree there are circumstances where those expectations can attribute to relationship failure. However, even when it is expected, when it repeatedly does not happen, the person expecting the abuse begins to to realize this and eventually come to not expect abuse from this person. Of course there are other issues and circumstances that come into play. For example, the person who expects the abuse may(unconsciously) provoke the other into violence through verbal abuse or unacceptable behavior. The other person may end the relationship for their own mental health and the abused never comes to realize that this person is not abusive.
Women who have been abused by men, during childhood or adulthood, parent or partner, or even witness abuse by men, will often minimize other behavior in men that they would otherwise find unacceptable, and even compliment partner on not being abusive.
It is very common for women who have a strong history of abuse, when describing their non abusive partner, to state, "he is not abusive" when not even asked. ex;he drinks too much and calls off work, but he's not abusive.
Thats great that he does not physically abuse-he gets points for it-thats all I am saying. Because of abusive men, those who are not abusive are given points for not being physically abusive. Those who have been physically abused or exposed to a lot of physical abuse, may be more inclined to overlook other unhealthy behaviors such as addiction, infedilty, or laziness. This is how all men benefit from those who are abusive.
I did not explain very well in my previous comment, but nobody needs to agree with me. After working with abused women for ten years and participating in training with the national coalition against domestic violence, I sometimes take for granted the awareness that is developed as a result and fail to fully explain.