The short answer is “Yes,” but there are some important details to consider.
The only caveats I’d place on that answer is that it’s probably not a good idea to use masturbation fantasies to condition yourself toward certain actions, especially if you’re the kind of person who ever has trouble telling fantasy from reality, and I’d discourage anybody from indulging in rape fantasies that glorify the act of rape. Otherwise, go at it. Fantasize away.
Just keep a strong wall inside your mind dividing this part of your fantasy life from anything that you’d ever consider doing in real life.
The first place that I encountered the idea of rape fantasy, the naming of it, was when I was reading sex manuals along the lines of “The Joy of Sex,” or “Everything You Ever Wanted To Know About Sex* (*But Were Afraid To Ask).” One or more of these tomes had passages on rape fantasy, mostly explaining what it was, and that it was okay. I seem to remember them focusing more on women having fantasies about rape than about men (or women) having fantasies about committing the act of rape, but it’s been a long while since I read those books.
I don’t remember how old I was when I first encountered the idea, but I do know that I first read those books years before I hit puberty. I didn’t realize it at the time, but I’d already had at least one rape fantasy that I remember. I’d attended a circus at one point, Barnum & Bailey’s, and I was among a handful of children who were picked to go down to the show floor. There was some kind of undersea theme, and they gave us special hats to wear, telling us that we were colonels in the undersea navy or something like that.
The rank was important because I remember thinking that it would give me some kind of authority to order the undersea soldiers around. I remember thinking that I’d like to order my minions (I didn’t use that word, just the concept) to take some of the lovely ladies of the circus that I’d seen performing earlier, and to strip off their clothing. I wanted to see what they looked like naked, the ladies that is.
Not technically a rape, but certainly a violation that demonstrates one of many reasons why it would be bad to grant young children any level of military command. Fortunately for the ladies, the soldiers, and myself, my special rank only allowed me to be paraded around for a bit, then returned to my seat. Or something. It’s so long ago that I’ve forgotten much of the incident. I do remember the moment of the fantasy, and I probably returned to that scene when I grew old enough to start masturbating, changing the memory of the fantasy into a new fantasy.
I can’t say if that was my first rape fantasy, and I can’t say how many I’ve had since. I can tell you that a very, very large percentage of the jokes that bounced around the playground of the grade school I attended were, in hindsight, bizarre rape-fantasy instructionals for blackmailing girls into nudity or various sex acts.
The standard joke would be something along the lines of:
A boy catches a girl in the act of peeing, and he sees her privates. She’s embarrassed. The boy tells her that he won’t tell anybody that he saw her peeing, IF she promises to give him a closer look at her private parts. She agrees. He then tells her that he won’t tell anybody that she showed him her private parts, IF she takes off her clothes entirely…
And so on, and so forth. There was rarely if ever any kind of punchline to these “jokes,” but they weren’t exactly porn either. Although that basic plot IS used in plenty of porn and erotica today. Anyway, these jokes were extremely common. They weren’t about overt rape-by-direct-force, but rape-by-blackmail was extremely common, as was rape-by-deception, and various other forms of sexual coercion.
I’m not going to say that any of it was healthy for society, but I can say that the vast majority of the kids telling that kind of joke did not turn out to be rapists that I’m aware of. I certainly didn’t turn out to be one.
The harm from those jokes would come not from the plot, but from the execution of of the story. They didn’t normalize the sexual assaults, but they did make them seem clever. They perpetuated the ongoing social narrative that it’s a boy’s job (or at least natural and reasonable inclination) to try to trick or trap girls into nudity/sex, and that it’s a girl’s job to protect herself. If the boy succeeds, then the only problem (in this narrative) is that the girl was foolish.
The stories glorified the predatory acts.
While it’s arguable that none of these stories directly caused anybody to ever commit a rape, I would say that such stories did (and likely do, if they still exist on the playgrounds today) perpetuate and reinforce rape culture. That is a bad thing. That kind of story can be harmful.
Do not indulge in rape fantasies that in any way glorify the act of rape.
Other rape fantasies that I encountered growing up were in the form of Damsel In Distress form, and were quite common in television, movies, and books. A woman would often be vaguely threatened by a man, she’d be breathless, her clothing might get torn. In the more family-friendly mediums, things would stop there, with the unspoken threat of rape. Sometimes the act might occur, but happen off-scene.
These scenes were generally crafted for the Male Gaze, to titillate the audiences. They could be problematic in a number of ways, but they did make the point that the attacker or potential attacker was a Bad Guy, not somebody that anybody should emulate.
The same kind of thing happened a lot in horror films, only more graphically. Same with certain action movies, like “Death Wish.” The stories were crafted for the viewers to be turned on by the nudity and the forced sex, but to avoid condoning rape. This is why “Rape and Revenge” movies (and books, and everything) are a thing: they allow the audience to experience the thrills of a fantasy that they know is wrong, and they allow the audience to experience the satisfaction of seeing justice be eventually served to the perpetrator that they were earlier vicariously thrilled by.
Most people aren’t likely to go out and commit rape based on “Last House On The Left,” “I Saw The Devil,” or “I Spit On Your Grave,” where the rapists are shown as despicable beings not to be emulated, and the rape is morally condemned instead of glorified.
I don’t think that the vengeance/justice aspect need be a part of personal masturbatory fantasies, but I do think that the moral condemnation should be clear. It’s okay to fantasize about rape, just as it’s okay to fantasize about murder, robbery, zombie apocalypses, and all sorts of other things that would be horrible in real life.
It’s okay for a man or woman to fantasize about raping.
It’s just not okay for them to fantasize about rape being in any way good, noble, or justified.
Once in a while, it’s fun in our fantasies to play the role of the Bad Guy. The only danger is if we end up playing him/her in real life.