There are people out there (men mostly) that are obsessed with demeaning women. I for one have never thought of it as "normal" or a part of normal sex. I dated a woman in my 20's who told me that a guy she dated was obsessed with strippers and all things porno movie related. When her and I "bonded" I noticed that she could not let go of the things from her old relationship. She would start pole dancing in the bedroom (I giggled and told her it does nothing for me) then she wanted to do these porno movie things (not sure how to explain it but you would know it when you see it) and I giggled again and said it's funny but something I need. I told her smiles and loving looks are what "do it for me" and those take time to develop and you all you have to do is be yourself.

Sadly she broke up with me cause I was nuts about gloves and she actually hated them So, in the end I had to assume that I was there to teach her to love herself and teach her that there are other kinds of guys out there. She taught me to enjoy other kinds of movies I had not watched before (romance, romantic comedies) and that surrendering your ego is what a relationship needs to start seeding.

I hope my rambling helps in some way.