“And you’re absolutely sure these injections will work?”
“Yes. They have been tested on willing subjects, and those men have all turned into willing ass slaves.”
“And it won’t matter if he's my son?”
“We have no injection for that, but the desire to be an ass slave is pretty powerful. I think he’ll succumb to it.”
“Thanks, doc,” Neil said, handing the doctor an envelope filled with cash.
A couple weeks later, Neil’s son, Brayden, checked into the doctor’s office. He was in for his routine physical, that he needed to have if he was going to play football next year. The physical went off without a hitch, even though Brayden, like most men, didn’t want another man touching his balls, even if it was for a good cause. However, at the very end, Brayden didn’t like the expression on Dr. Gregson’s face.
“What’s the matter, doc?”
“Well, Brayden, you seem to have a deficiency of protocytonucleic amoebas. Without an optimal level of them inside of your body, I’m afraid I can’t clear you to play sports or do any strenuous physical activity.”
“Fuck, doc! What’s the cure?”
“Well, the good thing is that we can inject these little fuckers into you to bring your levels up. The bad news is that we can’t do it all at once, or we’ll overwhelm your system. You should be ready and raring to go by the time the season rolls around. I’ll sign any paperwork I need to ahead of time if your numbers are looking good.”
“Thanks, doc!” Brayden was a little concerned about his low numbers of whatever the fuck those were, but if it just required a weekly shot, then no problem! He got his first one later that day. He was a little bit puzzled on why Dr. Gregson did it, even though nurses were usually in charge of giving shots. He brushed it off, saying that this deficiency was pretty rare, and he was one of the few doctors who could treat it. Brayden accepted the explanation, and set up an appointment for next week. Over the course of that week, neither Brayden or Neil noticed any changes.
There was only one small thing that Brayden noticed. As he was cleaning his ass in the shower, the soap slipped, and so did his hand. It fell in such a way that one of his fingers went into his asshole for a split second. Brayden wasn’t exactly sure what caused that, but the feeling of his finger in his ass was weirdly hot! He brushed this off as some gay shit, though, and went back to showering. He didn’t even think of bringing it up with Dr. Gregson as he got his next shot.
That week, there were definitely some noticeable differences. The night after the second injection, Brayden was watching a porno where a chick took it up the ass. The video wasn’t turning him on as much as he would have liked, but he was getting turned on by thinking of taking it up his own ass. He wasn’t fucking gay, although he had to admit, the black stud that was fucking her was pretty fucking handsome! He wondered if he might be into pegging. Unfortunately, he didn’t have a girlfriend to try it with, and that was not usually something that was broached on a first date.
While his dad was at work, Brayden raided his room, looking for sex toys. Neil and Iris had separated a few years ago, but Brayden had sworn he had heard moans and groans coming from his dad’s room before, recently. Eventually, he found it. It wasn’t a strap-on, but an actual male dildo. Neil was bi, and Brayden knew that. He looked around to see if there was anything less gay, but he came up with nothing. He took the dildo back to the room and covered it with some of the lube he had tucked away.
He slowly but surely shoved the dildo into his ass. Brayden expected it to hurt, and his own moans and groans showed that. However, it was also turning him on a little bit. His dick was starting to chub up, and he wasn’t too sure, but it might have been pressing up against his prostate as well. He then began fucking himself with it. It was definitely weird feeling a cock up his ass, but he did love the sensations he was feeling. He didn’t cum with the dildo in his ass, but came because of the dildo in his ass.
Brayden didn’t think that this was something to bring up with Dr. Gregson as he was getting his third round of injections. It was 2020, sexuality was fluid. He knew about sexual infections and all that. Brayden had been using the dildo more and more ever since he found it, but the night after the third injection, he noticed something even stranger. Instead of clicking on a straight porn video, Brayden clicked on a gay one. Now, it could have been a honest mistake, especially with a gangbang or threesome, but there was no mistaking that this was a gay video. Brayden didn’t close it immediately, though. He actually wanted to watch and see these men get fucked up the butt by other men. This was turning him on as well. He knew he wasn’t gay, but could he actually be bi?
Neil finally noticed a change in his son when the two of them went shopping that weekend. Brayden was looking for new clothes to buy. He thought his dad didn’t notice, but Neil definitely connected the dots and figured out that all of the pants Brayden was buying were tight, and showed off his perky bubble butt. His shirts weren’t as tight, but they were definitely tighter than the ones he normally bought. Neil didn’t say a word, but texted Dr. Gregson once he was alone that the injections were working.
Later that night, Brayden went to the bar. It was not a gay bar, but a few gay men frequented it anyways, the next closest a few miles away. Brayden had hoped the empty seat next to him would be filled by a hot chick, but instead a muscular man sat down next to him. He expected him to turn to the chick two seats down, but instead, he struck up a conversation with Brayden. “Hey, man, I noticed you across the bar. Do you work out?”
“Yeah, I try to hit the gym most days. I play football.”
“Sweet! Which position?” Brayden and the man, Marc, had a long conversation about many topics. Marc revealed he was gay, but Brayden remained coy about his sexuality. A few drinks in, Marc brought up the question. “Want to take this back to my place?”
“Uh, sure,” Brayden said. Just a few weeks ago, he would have said no. But Marc definitely seemed like a top, and one with a big dick to boot. Brayden really wanted to feel it inside of his asshole. He explained his situation to Marc once the two of them had stripped each other naked.
“Oh, it’s no problem, babe. I’ve taken the anal virginity of quite a few guys before!” Brayden definitely had to admit, feeling a cock connected to a person was so much better than a dildo fucking him. Yeah, Marc’s cock was a bit smaller than the dildo, but it felt so much fucking hotter! Brayden even came with a cock inside of his ass for the first time, real or fake.
The two didn’t exchange numbers, but probably should have, once Dr. Gregson explained all about the STIs and other stuff involved in gay sex at the fourth injection. As Brayden was driving back home, Dr. Gregson texted Neil the update. Making his son into an ass slave was coming along swimmingly. Brayden was now exclusively watching gay porn, and as he focused on ass videos, he stumbled upon the idea of a rosebud. It was so fucking hot seeing another dude’s ass outside of his body! It would be awhile before his ass was ready to do that, but he wanted to do something to show that he loved taking it up the ass.
Neil was admittedly a bit shocked when an alert came up on his credit card that it had been used at a tattoo parlor. He had given Brayden permission to use the card, but when he walked in that evening, presumably after getting the tattoo, Neil hadn’t noticed anything. That was because Brayden had gotten the tattoo around his ass, almost making his asshole look like the sun. He made sure not to get the tattoo close to his asshole at this size, as it would slowly be expanded. The tattoo artist also pressured him into getting a piercing right above his ass as well.
Brayden had started signing up on a few gay dating apps, and was calling himself a bottom. He wanted his ass to get wrecked by men with big cocks, and most nights, he was able to achieve that, sometimes even getting two cocks in one night! As Dr. Gregson was injecting the fifth week of the solution into Brayden, he reckoned that some of the more mental changes in Brayden were bound to occur. He had already been turned into a gay bottom slut; now he just needed to think of himself as an ass slave.
He was definitely going down that path, as the night after the injection, Brayden referred to his hole as his cunt for the first time in conversation. It turned the dom top he was talking to on, and that night, Brayden had one of the most intense fucks of his life. His ass even rosebudded a little! That week, no night went by without him getting fucked by a dude with a massive cock. He was even able to be double penetrated now! He didn’t bring up his newfound sluttiness with Dr. Gregson, but the fact that Brayden winced as he sat down told Dr. Gregson all that he needed to know.
This week would be the final injection, but Dr. Gregson penciled Brayden in for another week. Neil had something he wanted to do with Brayden, and Dr. Gregson definitely agreed to it. The rest of the week was pretty similar to last week. Brayden had become a voracious bottom whore, wanting something in his cunt at all times. It didn’t matter who was fucking him, even if it was one of his college classmates, a fellow football player. Brayden also started to show off a submissive side of himself as well. He loved being used like a rag doll, being bounced around as men with thick and juicy cocks fucked his ass. Brayden wanted to be told what to do, and sometimes just obeying orders caused him to leak a little bit.
When he showed up for his next injection, he was in for quite a surprise. Neil was in the room, with a box in his hand. “Dad, why are you here?” Brayden asked. “And Dr. Gregson, where’s the equipment?”
“Son, there’s no shot today. Strip and show me your cunt.” Brayden was torn. He really wanted to follow orders, but they were from his dad and involved stripping naked in front of him. Eventually, his desire to obey won out in the end, and he hopped up on the table, showcasing his cunt to his father and doctor.
“It’s much looser than I remember,” noted Dr. Gregson. “Your son has really turned into a bottom cunt, hasn’t he?”
“Damn right,” Neil said. “He’s my bottom cunt. Isn’t that right, Brayden? Don’t you want to be Daddy’s bottom cunt?” Once again, Brayden was at an impasse. He really wanted to say yes and feel the rush he got from obeying, but on the other hand, it was his dad. “Will this change your mind?” Neil asked, taking what was in the box out of it. It was a massive dildo, one of the widest Brayden had ever seen. “I’m going to stick this up your ass, and you’re not allowed to take it out unless Daddy fucks you. Is that clear?”
Brayden only had a puzzled look on his face for a second before announcing, “Yes, Daddy, I’ll be your bottom cunt!” Neil smiled as he shoved the dildo up his son’s cunt. The two of them went home, and Neil fucked his son in the ass for the first of many times. Turning his son into his personal bottom cunt took some time, but it was definitely worth it in the long run.
