My own view is that some acts are objectively wrong, regardless of "consent." Put them in the "depraved heart" category of crime. Whether it's done to the "consenting" Anastasia Steele or the "consenting" Atika Latifi or Umm Bint-Anybody, it's reckless endangerment maybe, assault for sure.
There are some things you shouldn't legally be able to consent to. Among these: (forcible) rape, slavery, sodomy, torture, assault, murder.
Well, let’s put it this way: for the women who don’t volunteer for beatings and subjugation in our society, the law will protect them and is on their side. In majority Islamic societies or communities, not so much.