Totally against rape. But fantasy-wise must be very careful.
Short Story time
Ex-GF and I had a code word to stop (watch movie learn one), as in the heat of the moment, it can get quite rough.
Was in my late teens or early adulthood when we first tried out this fantasy. We were both very open about what we liked, fantasised about, etc, and tried to accommodate each other as much as possible.
It was during one of the chillout sessions that we talked about the different fantasies that we have (cosplay, outdoor sex, role-playing etc) which was when we talked about rough sex (not the normal bdsm type, but like really physically hitting with the fist or hands).
She was in mixed martial arts and actively joined competitions overseas (though never won any medals), and I was more into gymming and stuff.
The topic came up again when we were planning a staycation when her parents were going overseas, and the "rape fantasy" came up as an obvious choice.
It was a no-holds-barred rape fantasy, we planned on how she will leave the door unlocked, and I will barge into the room, she will be "sleeping" as I force myself on her and she will resist (with force).
We set out parameters on what and where can be hit, and what cannot be done. (face and chest only can slap. belly, thighs, and buttocks can hit with fist - but not overly hard. No use of external items etc).
The whole thing was messy as fuck, even with all the planning and stuff. I was almost sent to the hospital (Yes, I was injured by a girl who was much smaller than me).
Slaps on her face, with punches in the tummy, and choking of the throat, while she struggled in pushing, hitting, and even trying to kick me in the groin. I pulled her clothes, tugging them tightly shaking her to and fro, trying to rip them apart as I backhanded and slapped her face (she chose an old set of clothes and innerwear which she was prepared to throw away).
The whole thing was a mess, as our clothes got torn, with slaps and punches going everywhere, even clawing on my skin as she tried to push herself away. (I was dodging face injury from her, as she was like lost in the moment). It was after much effort (Yes, she struggled a lot and I had to hit her a bit harder in the inner thighs before her strength gave way), that I was able to force myself into her, with her all wet and dripping from the intense "fight". I cummed quickly (less than 2mins) into her (she does allow cip as she is "safe"), from the excitement.
Anyway, the whole thing didn't last long, while I started round 2 I got my penis injured when I tried to force anal her (yes, she allowed anal, and yes we do it frequently). Couldn't penetrate properly and amid the whole struggle and I missed the spot, causing my penis to bent due to the force.
She was "acting" the role of the "victim" by punching me in places to which we said "no". In the midst of all the chaos, I was more like the "victim" as afterwards, other than the penis injury, I had a lot of claw marks, bruises, and swelling all over my face body etc... (even my parents thought I was beaten by gangsters and stuff... LOL)
PS: She is now happily married to an angmoh overseas who is also into mixed martial arts...