Dr. Mercury had thousands of cases worth of experience when the first incident occurred. As a vaginoplasty surgeon, it was hard to get that much experience unless you operated on a sliding scale that included free surgeries; and worked under a model of informed consent. By doing both, Dr. Mercury was able to portray himself as a benefactor to the community while at the same time having a steady supply of practice meat that nobody cared about. Vagrants, prostitutes, lunatics. People cut off from every sense of community. People nobody would miss.
Not that many of them complained. Even the worst fuckable hole was a step up in the minds of these desperate perverts from the equipment they’d been born with. And besides that, many of them wound up dead or in prison within a year or two of the surgery anyway. Of diseases, or of complications from street life, of course. Not from the doctor’s surgery. Even at it’s worst he still prided himself on having a bottom line he wouldn’t cross.
Regardless, after thousands of surgeries including more than a few experimental procedures, the doctor had come up with a technique which generated what was basically equivalent to a cisgender natal vagina. Better, even: capable of authentic vaginal orgasm. This was done with a mixture of stem cells and a modest nanomachine payload. The patients who first experienced the procedure reported feeling as if their new genitals had a will of their own to an extent, that will of course being to be fucked. Since they were aroused all the time, they were also wet all the time, but despite this strange side effect, the clinic became the only place to go for surgery. He liked to boast that he had amended god’s mistake when he made the vagina do triple duty for sex, reproduction, and waste disposal by creating a pure sex organ. Another triumph for science.
The doctor liked his theatrics. He would have his nurses wheel his patients into the surgery rooms, apply the first stage of anesthetic via inhaler mask; paralysis drugs; and then leave them there until he arrived to apply the second stage, the actual numbing agents, at which point he would begin the surgery. It was on a normal occasion like this that he arrived in the surgery room to find the patient wasn’t there. In their place was a rich purple hued vaginal fleshlight, sitting in the middle of the hospital bed. The pussy was wet and bore every resemblance in form and function aside from it’s color to the doctor’s own handiwork. Smirking at the obvious joke, the doctor asked the nurses if they’d moved the patient to another room by mistake. But they were adamant they had not, and after investigating internally, the doctor finally decided that the patient must have simply gotten cold feet and left. They were one of the vagrants, so it didn’t really matter anyway.
The fleshlight went in a drawer and was forgotten about. Until it happened again. Another purple vaginal fleshlight for the drawer. Being a quick learner, and knowing it was only a matter of time until it happened to someone people were actually keeping track of, the doctor decided to place camera’s in all the surgery rooms, and record whenever a procedure was underway. This is when Gina Castor entered into the story. Gina was a beautiful young 20 something who had survived and maintained her beauty by attending federally subsidized public colleges for 5 years. Despite her stunning appearance and perfect figure, she was not well connected socially or economically and had qualified for surgery under the modest price schedule of $1000.
She was wheeled into the same room where the other two fleshlights had appeared. Her medical chart hanging at the foot of the bed read:

Name: Gina Castor
Sex assigned at birth: Male
Sexually attracted to: Men
Blood type: A
Birth Sign: Taurus

Watching the feed, Doctor Mercury noticed what at first appeared to be a white light, but then settled down into a winged naked woman. He watched the being sprinkle dust over the paralyzed, naked Gina, her supple breasts and shapely ass noticeable even through the camera. Transfixed, he watched Gina’s legs and arms shrink and withdraw, followed by her head. Her breasts merged with her torso as it shrank until they formed a cylinder of what was obviously still breast tissue, as her hips cylindrified simultaneously, her entire body shrinking and ultimately turning purple, terminating in a wet and ready signature Dr. Mercury vagina.

Then the being spoke: “Well, hope you’re happy. You wanted to be the female sex, and now you are. The female sex and nothing else. Hope that’s what you wanted when you signed up for a sex change! You turned out great though! The boys are going to love you.”

With that the being flew off, and the doctor went and retrieved poor Gina and placed her in the drawer next to the others. He watched the footage over and over again, then he reviewed the evidence that he had. The fairy had only done this to androphiles. So far, she had also only done it to vagrants and losers, but the doctor felt that was more a matter of luck than anything. But he was intrigued. He had to speak to this being. As a scientist it was simply too curious a case to leave uninvestigated.
He caught the fairy just as she entered the room of the fourth victim. “I admire your work,” he said. The fairy was caught off guard.
“Thanks. I think of it as a correction of yours.”
“How so?” said the doctor, as the fourth victim laid there in paralyzed stupor.
“Being a woman is a holistic matter, it’s not a matter of having a hole that’s open for business. These men just want a hole they can get stuffed, so I give it to them. Seems pretty straightforward,” smiled the fairy.
“So they’re still conscious? And they’re stuck like that?”
“Of course. Even God can’t undo my work. Even if they’re somehow destroyed, even if they’re Christian and make it to heaven, the best he can do is assign them a consort of angels to service them. Even if they’re Buddhist or Hindu, they will simply be reincarnated as another identical fleshlight. A closed karmic loop, forever.”
“Don’t you feel guilty for that?” asked Doctor Mercury, but he was feeling something terrible and vindictive stirring within him simultaneously. Something that matched frequencies with the words and ideas of the fairy.
“Guilty. Why would I feel guilty?”
“Well,” said the doctor, “They have other holes too which they would also like to be used. Many of them are prostitutes and couldn’t bear to be without them. Is it possible you could split them into three separate holes instead of just the one?”
“Oh! That’s a great idea!” said the fairy, and immediately flew over to the naked patient and sprinkled dust on them. “Sorry, Doctor’s orders!” He watched a modified version of the same shrinking process give way to three purple fleshlights: a pussy, an anus, and lips, complete with red lipstick.”
“The lipstick is a nice touch,” he offered.
“Thanks!” said the fairy.
“Listen,” he continued, “I don’t mind you doing this. In fact I respect it very much. But if you want to continue doing it, you’ll have to avoid doing it to the wrong people. I service mostly vagrants here. I will put them in just the first five rooms for you. Anyone else you have to leave alone though, deal?”
“Sure,” said the fairy, “But you have to do me a favor too.”
“What’s that?” asked the doctor, genuinely curious.
“You have to sell the fleshlights. Preferably to places they’ll get continuous attention. Truck stops, for instance. Gay bars. I’ll mark the ones for gay bars with a tranny symbol so they won’t get weird about fucking the pussy. They’re meant to be used now, not just to sit horny and yearning in a drawer forever.”
“Of course!” the doctor cried enthusiastically, “Of course.”
From this fateful exchange, the doctor was finally able to recoup some value from the losers who regularly graced his clinic. And when a nurse got wise to his scheme and tried to blow the whistle, going so far as to upload the video of poor Gina Castor to Pornhub (the only website that didn’t flag it and take it down immediately), the result was only an increase in the number of customers; and victims. It turns out some people really do just want to be the female sex.