Psychologists have discussed the difference between 'rape' and 'rape fantasies'. Rape fantasies are a lot more common than you think. They're why you see silly comments like, "I want ____ to rape me" and you think, "But then that's not rape if you want it?" Because they don't actually want to be raped. They want to be sexually dominated.
At the end of the day, the enjoyment of 'rape fantasies and porn' have more to do with a lust for dominance and/or submission. It is where kinks like bondage, roleplay, pain, and asphyxiation thrive. These originate from a desire to either completely sexually control your partner or be completely sexually ravished beyond control. There are willing participants of both sides of the coin, but at the end of the day, they want something safe and controlled. Safe words or actions to break from the emersion in case of danger. Willing participation. The safe reality that this is a dual consensual sexual interaction, and life can happily move on from it.
Because the real thing? Putting anyone through rape is horrible and unforgivable. On one hand, not everyone is interested into such power fantasies, so already, they're putting unwillingly participants through something terrible. But to perform actual rape on someone who enjoys such fetishes? It doesn't pleasure the victim, and it actually doesn't pleasure the giver. The victim gets left behind with horrible after effects like injuries, STDs, unwanted pregnancies, and possibly the guilt that they might have enjoyed it (even if they didn't). And, it is unfulfilling for the rapist, because at the end of the day, one of the best appeals to sex (regardless of kink) is the feeling of wanting someone who wants you. Raping will never fulfill that fantasy, and it is why rapist say stupid shit like "You liked it" or "I love you". Because they want to believe the lie that it was a wanted exchange.
A lot of this gets lost in translation in people's fear to discuss sex.