People with r*** kink are just masochists who didn't have a BDSM experience
And that's my unpopular opinion. Most people who said to have such a kink told they have a desire to have be taken advantage of and have control taken from them. Doesn't BDSM include those things to some degree? If you plan it out with a Dom with proper consent and a safe word, you could find whatever you're actually looking for. There's no need for actual r***.
And as always, if so happens to be someone who was actually r***d and has this fetish, that's a whole nother issue. Also I'm open to hear any arguments you may have, whether is it in favor or against it.