This quote by C. K. Egbert shows why we cannot make “consent” our only standard of whether an action is moral or not:
“Let’s presuppose that we live in the world the BDSM people would like, where the “physical details really only matter in the contexts of safety [sic]…and consent…” There are several problems with the idea that we should divorce harm from wrong. The first is that there is no longer any way to conceptualize bodily integrity (including the harm of pain or suffering); consent by itself cannot differentiate between the harm of rape and the harm of a stolen pencil. Any attempt at putting limits on the violence, or adding in additional constraints, will be merely arbitrary and ad hoc.
As a result, there are no limits to the abuse men can inflict upon women (even to the point of murdering women through sexualized torture, as happened in the Cindy Gladue case). It will be even more difficult for women to prove assault or abuse (in addition to the inherent problems with proving non-consent) because it will be presumed that a woman could have consented to anything.
… The only harm that is recognized is when the woman herself sees it as a harm, and yet she is being told every day of her life (through pornography, socialization, and through our social responses to violence) that she deserves to be hurt, used, and violated. This is especially pernicious given that women already minimize and deny their experiences of abuse…
We already know how “fantasy” plays out in real life. Many men would be willing to rape using physical force or intimidation, if they think they could get away with it (if we include emotional coercion, bullying, pressuring, and manipulation, no doubt the numbers would be much higher). Thanks to increasingly violent pornography and the mainstreaming of BDSM, men are coercing women into more painful, dangerous, and violent sex acts.
“Consent”, while it is certainly a part of ethics, cannot distinguish between rape (or murder, for that matter) and a stolen pencil. Our ethics certainly need to go further than that. And it does not become okay to violate and torture a woman when you (and society) convinced her she deserves the bad treatment.