The story described below is fictitious, but bear with me, I'm going somewhere with it:
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It had been two weeks since Cam had orgasmed in Her presence. Two long weeks of frustration and longing. Cam's balls ached to cum, sex was all he could think of and it was driving him to distraction. So much so that she promised him that night, "Tonight, you will earn your release. But only if you do one thing for me. After all, remember our agreement, I get to have twenty orgasms to every one of yours. And I get to have them in any manner, and with whomever, I so choose. So will be a good slave for me tonight?"
"Yes Mistress," Cam replied.
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Later that evening, Cam was on his knees in front of Her. His cock uncaged for the first time in weeks, he had a raging hard-on at the sight of Her, looking so naughty in Her tiny little plaid skirt, and knee-high leather boots. She wasn't wearing anything under that skirt, and even the smell of Her body was driving Him wild. His cock was at full staff...
....but looking positively puny in front of Her lover, who stood next to Her, his equipment- nearly ten inches- also at full staff.
"You remember our agreement, right?" She barked. "Do it then. Get him nice and hard for me. Fluff him. You know you want it." She laughed.
Her lover laughed too. "Guess you're gonna be my suck boy, while I fuck your girlfriend, right?" He sneered. Cam was trembling. After all this, could he really do this?
Leah reached around and grabbed his head, directing it at Erik's huge erect manhood. "Go on then, slave. That's right. Put it in your mouth. Like We practiced. Do it for me. Get him hard, and maybe I'll let you clean us both off afterwards. And if you do your job well slave...Maybe you'll get your reward too." she whispered this last seductively.
But then She barked, harshly, "Suck it slave!" Cam felt Her flogger thwack his back. She must have grabbed it off the bed when he was focused intently on the task in front of him, he thought.
Gingerly, he steeled himself and grabbed Erik's penis, drawing it close to his mouth. Slowly, he wrapped his mouth around it. The taste...oh God, was he really doing this? Erik's member filled his mouth, probing him, and forced it's way to the back of His throat. It was gagging him, but he resolved to get it over with and began slurping, bobbing his head up and down against Leah's lover's cock. The humiliation was surreal, but the thought of that gorgeous, huge cock about to satisfy Her, was like a dream. He had not gotten to actually penetrate her (except with his tongue) in many months, so perhaps he could live vicariously through Erik this night. Finally, after several minutes, Erik pulled his cock out of Cam's mouth, shaking. Cam gingerly swallowed the salty taste of pre-cum. This was the first time he had tasted any that was not his own. "Geez, that bitch of yours gives good head! I almost came!" Erik said. To which She replied, "That's why he gets to do it- After all, he knows that tiny little thing of his can never satisfy me!"
But later that night, when he finally orgasmed in front of his beautiful, majestic Goddess, the power and intensity of his release was like nothing he had ever imagined before. Afterwards, he lay there at Her feet, panting and in a blissful head space.
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This story is totally fictitious of course. But yet, it brings me to my point, This isn't that uncommon a fantasy of submissive men, especially those who are into the more erotic and less- painful /masochistic side of BDSM.
But why? This is what I'm getting to: Many assume that it's because these submissive men have repressed homo-erotic or bisexual fantasies and want a woman to help them fulfill these fantasies. While sometimes this is the case, usually it's for either one of three reasons, or a combination of them.
For one, there is the intense feeling of reveling in the absolute power of a dominant partner, and the desire to do anything to please them, and the more taboo and extreme, the better to experience this head space. Erotic humiliation, being "Used" for Her pleasure, are a huge turn on, and it's much the same for other extreme BDSM activities that many kinky guys find arousing- it is the idea of being subjected to humiliating, degrading or taboo things for HER pleasure that gives the sub HIS pleasure.
And the second thing, is the voyeuristic aspect. Like in the above example, Cam living vicariously through Her lover, getting to watch Her be pleasured, seeing Her satisfied is part of the turn-on, almost as if it really was him in Her lover's place.
And the final reason goes hand in hand with the first two: Part of it is a feeling, whether valid or not, that he cannot sexually satisfy Her, but yet, out of love and obedience, he still wishes to see Her get sexually satisfied. Perhaps he is, in fact, a good, well trained lover, but Her needs are far greater than one man, even the horniest and most virile, to satisfy alone. Or perhaps, like the above relationship, She loves, adores and cherishes him, but uses Her bull for her sexual needs- and nothing else, and this is simply part of the accepted dynamic of their relationship. As long as it is mutually consensual, then it works for both of them, but of course there would need to be plenty of communication before such a scenario could evolve.
But I post this in order to dispel the common myth that forced bi/cuck and bull scenarios are purely the product of men with repressed homoerotic fantasies. Most of the time, these men would never willingly have any kind of sexual relationship with another man, they have no desire to. Rather, it is their HETEROsexual desire of their partner, that leads them to engage in taboo behavior for their partner's sake.
And finally, before I end this lengthy wall of text post, I've always been curious as to how many women are genuinely interested in a cuck-and-bull scenario as described above. If they are, do they actually get a turn-on by their husband/boyfriend actively watching and participating, or do they prefer to "Cheat" in private? I know this is not that uncommon among submissive and sexually adventurous men, but I've been wondering how many women actually find these scenarios "hot."