Okay. I get it. Not everybody is a master of biology, hell, there are people who have entirely no knowledge of the female body. However, it should not come as a shock to you that, a woman who is not a mutually pleased participant in any act of a sexual nature, is not suddenly going to start enjoying herself if you try harder. She will instead get quite irate with you, the kind that that involves pulling a knife out of her boot and gutting you if she ever has the chance to do so.
That's how 'forced sex' works, you ignoble twits. It's not a pleasant thing, whatsoever, for the victim, and being surprised that the victim would not enjoy it even on a physical level is somewhat shocking and mildly disturbing to me. Seriously, no. If you want to involve drugs, or magic, or something else that changes the equation around to something more physically pleasurable but still emotionally traumatic go ahead, but unless there is something else at play, rape is never pleasurable for the victim.
That is all. You may now go back to your ignorance if you please, but... Well... Stop being surprised that women are not sex objects. Really. Just. Woosh. Do better than this!
Protip: The clitoris exists. They're like doorbells for women.