A Very Unexpected Situation

It was much too early in the morning for Twilight to be awake, but that’s what happens when one goes to bed really early, especially when you fall asleep on the couch reading the most boring of books with very little sleep from the previous night. With a lapse in her duties as princess, Twilight figured that now would be as good a time as ever to figure out a cure for a new disease that prevented pegasi couples from having foals. Unbeknownst to all but the princesses and those already afflicted, Celestia had ordered her to find the cure as quickly as she could before it caused widespread panic. She had been told to keep it all hush hush as she worked, for fear of this scaring everypony even though a cure was on the way. After a few days of running on almost no sleep and too much coffee, all of Twilight’s research pointed to the fact that the mares were perfectly capable of conceiving a foal, so that only left one other alternative: the stallions.

Without actual test subjects, Twilight figured that a low sperm count could be the only reason that prevented those couples from having offspring. Asking the local pegasi males to cum for her studies would most likely end up with them giving her a weird look and a resounding no, even though she knew that their contribution would be for a very important cause. She needed to have a base count from a pegasus stallion not already afflicted, and hopefully, she could get Celestia to send a couple of them her way. From what she’d discovered from reports of experiments done by Celestia’s scientists, this new disease was a mutated strain of the feather flu, and by her reasoning, it lowered a stallion’s sperm count to such a low level that it kept couples from conceiving a foal.

She trotted downstairs into the basement where she’d left her machines run overnight, mixing together a potion that would, in theory, boost the drinker’s sperm count by a factor of five with each small sip. To make it more drinkable, she’d steeped several tea bags into the potion as it cooked into its final form. Staring at the bubbling flask of light brown liquid, Twilight wondered who she would be able to test it on first. After several hours of working on finding the best variant of the potion, she poured her new concoction into one large beaker, then brought it back upstairs.

As the setting sun’s light shined in through her windows, she used her magic to write a letter to Celestia, asking her to send over a few couples who were having issues conceiving a foal so that she could test her new potion on the stallions. Hoping that they would arrive sometime tomorrow, Twilight set the flask down on the coffee table, and after grabbing a couple of mugs from the kitchen, poured the potion into them. The final step of making the potion asked for at least twelve hours of breathing time in a wide-mouth container, and since her living room was usually devoid of activity, she figured that she could just leave it there overnight so she didn’t have to walk all the way down to the basement to check up on its progress.

After making a mental note to buy a wider variety of chemistry equipment for future use, Twilight thought that she could just have Spike send the letter when he got back from playing with the Cutie Mark Crusaders. As she eyed the clock on the wall, Twilight decided that now would be the best time to take a long-overdue shower, especially since she had made plans to get dinner with Rarity that night.

With a quick burst of magic from her horn, Rarity opened the door to Twilight’s castle and made her way into the living room. She was quite thirsty, having had nothing to drink since earlier that day, and besides, today was the day where she and Twilight were supposed to go out for a nice dinner at a cafe down the street. As she lay down on one of the couches, she heard the sound of running water echo from up the stairs.

“Ah, how nice of Twilight to leave me with a cup of tea!” Rarity said as her eyes found two steaming mugs. Licking her lips, she swallowed once to wet her overly dry mouth. She reached for the closest mug and drained the entire drink in one go. With her eyebrows furrowing in confusion, she smacked her lips and muttered, “Huh... that doesn’t really taste like the tea that Twilight usually makes for us... Must be a new blend!” She set the mug back down on the coffee table, and still as thirsty as ever, she grabbed the second mug and drank that, too. Upon hearing hoofsteps come from just out of her view, Rarity blushed as she realized that she’d just finished off Twilight’s drink. As she watched Twilight walk into the living room, Rarity felt her unmentionables start to tingle.

Twilight stopped in her tracks as her gaze fell upon the two empty mugs. “I... you... you... Did you just drink those?! Both of them?!” she shrieked as her eyes went wide, staring at Rarity in utter shock.

“Well, yes? I’m sorry, dear, but I was just too thirsty to wait until we got to the restaurant.” Rarity crossed her hind legs and flicked her tail down over her butt. She felt a bit of arousal wet her tail as her labia grew puffier by the second. “You... didn’t forget about us going to get dinner this evening, right?” she asked nervously, trying to ignore the fact that all of her hooves were starting to tingle. Rarity glanced at the empty mugs and asked, “Also, I don’t know about this new tea that you made for us, it’s... rather different, and didn’t really taste like tea.”

She bit back a whine as she felt a droplet of her arousal slip from her pussy, dripping down onto Twilight’s couch. “I… I…” She tried to finish her sentence, but felt her mind grow hazy as her arousal continued to grow. Her vision grew blurry, and even several blinks did not solve that issue. She felt little pins and needles all over her body, and as her mouth went dry, she started to feel a little woozy. Rarity felt her inner thighs and privates grow uncomfortably warm, making her think that her tail was somehow trapping in the heat that her pussy was radiating. Ignoring the fact that Twilight would be able to see her fully-aroused state, she pushed her tail up and out of the way to try and cool off, but felt no change.

Twilight ran a hoof over her face as she groaned. “Rarity, that wasn’t tea; that was the potion I made to increase a stallion’s sperm count! Celestia asked that I work on a cure for some rare disease, and you just drank several days’ worth of work! Do you have any idea how long it’s going to take for me to replace some of the ingredients? Weeks, Rarity! Weeks!” Twilight huffed as she looked up at Rarity. She opened her mouth to continue her rant, but when she saw Rarity faint, her anger slipped away, replaced by a feeling of concern for her friend.

Though she didn’t know if her friend fainting was an effect from the potion or if it was from her flair for the dramatic, Twilight stood with trembling legs as she watched the fur on Rarity’s body bristle as her body began to change. As Rarity tensed up, Twilight’s eyes went wide. Before she could step forward, Rarity’s body stilled, then glowed with a soft white light. Even though she wanted to avert her gaze to protect her friend’s privacy, Twilight watched in awe as Rarity’s pussy disappeared, a set of balls and a sheath taking its place, forming in a matter of seconds. Her jaw thickened, and her legs grew more muscular. Rarity grew a little taller and thicker, but even though she was now a he, Rarity’s body was still as refined as ever.

“Uh... Rarity?” Twilight prodded Rarity’s side with a hoof, shaking him back and forth. Her eyes drifted down to his sheath as it started twitching, the tip of Rarity’s cock peeking out through his sheath’s opening. Her mouth became instantly dry as she heard Rarity groan, so she made sure to look away from his new parts before he woke up. She placed a hoof on Rarity’s shoulder and shook him again. “Rarity, wake up!”

“Huh? Wuz goin’ on?” Rarity asked, his usually light and beautiful voice now deep and rather husky. It still held a refined air, though he sounded a bit rough, like he’d just woken up with a dry throat from a night of heavy drinking. He looked down his belly and spread his hind legs, revealing not her princess parts below her belly, but a thick sheath, a set of balls, and the tip of his new cock. “Ahh!— Huh?” He cleared his throat and glared at Twilight. “Twilight?” he asked rather pointedly.

“Yes, Rarity?” Twilight sat down right next to him and licked her dry lips.

“Did you turn me into a stallion?” Rarity asked, his tone filled with no small amount of fear and anger.

Twilight bit her bottom lip and nervously cleared her throat. “Well, um... technically, you turned yourself into a stallion.” “

“No, I did not!” Rarity said, turning his nose up to the ceiling. “Why would I ever do such a thing, Twilight? I am a lady, not a… a… a stallion!” he said, his voice nearly reaching screeching levels. “And if this is some sort of prank, well, it is not funny!”

“It’s not a prank, Rarity, I promise,” Twilight said with a roll of her eyes. “When have I ever pulled a prank like this?”

“I, uh… did Rainbow Dash or Pinkie Pie put you up to this?” Rarity asked, his tail flicking back and forth every few seconds.

“Ugh… Rarity, it’s not a prank!” Twilight said, raising her voice. She stomped a hoof on the ground to emphasize her point. “When did I ever make tea before you got here, and why would you ever drink something without knowing what it is? Didn’t you even look to see what it was before you drank it?”
“No, but…”

“No buts, Rarity, unless you want me to believe that you just drink whatever you see without thinking,” Twilight said as her wings bristled in annoyance.

Rarity humphed, then crossed his forelegs as he glared at Twilight. “Well... fine! Change me back this instance!” He rolled over onto his stomach and gasped lightly as he put a little bit of pressure on his overly-sensitive balls. “Ouch! No wonder stallions freak out when these are kicked... Simply laying on them for a split-second hurt!” He adjusted his position on the couch to make sure that he wouldn’t do that again.

“I wish I could say I know what you’re talking about, but...” Twilight snickered. “I don’t have big balls like you do.” She lifted a hoof up to her face to hide her growing smile.

“Twilight, this is not a laughing matter! I need the antidote at once! I’m supposed to meet an anonymous high-class pony from Canterlot later today.” Rarity rolled onto her right side, lifted his left hind leg, and peered down at his new set of genitalia. “I don’t want to lose this business opportunity! If I can keep getting high-class ponies to wear and show off my work, I can start to open more stores around Equestria, but if they show up and don’t find who they’re expecting…”

“Well, either you reschedule with them or make something up, like you’re Rarity’s big brother and that she’s out of town till tomorrow, or something like that.” Twilight started pacing around the room as she rubbed her chin with a hoof. “I can’t really think of any other way for you to get around this.”

“Twilight!” Rarity whined as his ears flicked down to lay flat against his head. He watched as Twilight walked around the couch a few times before he spoke again. “Please tell me that you have an antidote…” he said, biting his bottom lip as he waited for Twilight to stop and reply to him.

“Actually…” Twilight chuckled, then stopped halfway through as she felt Rarity glare a hole through her chest. “Sorry,” she said with a sheepish grin. I know this situation isn’t really fun for you, but… I was actually hoping that I could get a test subject later today to see how the potion affects them, and since it’s technically a drug, not a potion, I’m afraid to say that there is no antidote.”

“Why… not?” Rarity forced herself to bite back a snarl as her upper left lip started twitching.

“Well, the stuff you drank is meant to increase a stallion’s sperm count, and all of my research shows that the potion’s effects should wear off overnight, so in theory, you should be back to normal by the time you wake up tomorrow.” Twilight blushed as she rubbed the back of her head. “Say, Rarity, since you’re already over here... is it okay if I run some tests on you? I would really appreciate it if I could spend the next four to seven hours studying you. I really, really would love to see how exactly your body has been affected, and to see how your sperm count level compares to future test subjects.”

Rarity deadpanned, staring right into Twilight’s eyes. His upper lip twitched again. “No.”

“Well, I guess I’ll just have to find someone else’s sperm to analyze.” Twilight rolled her eyes and sighed. “It’s too bad though, I would have loved to see how you would react to having your new... package get stimulated until orgasm.”

“Yes, but I’m sure you’ll find somepony else more willing than I to experiment on.” Rarity’s eyebrows furrowed as he quickly lowered his hind leg, trying to stop his cock from hardening. Just thinking about having Twilight make him cum through various means, most likely through magic, coupled with the enticing thought of shooting his hot spunk all over the place, was more than enough for him to lose what little control he had over his new gear. His tip poked out from under his leg, appearing from under his belly. The bottom of his soft tip tingled oh-so-pleasureably as his weight pushed it down across Twilight’s soft couch. “Oh dear, this is...” He felt blood rush to his cheeks as he shifted, knowing that it was all but futile to try and hide his arousal.

“Awkward?” Twilight softly asked, her eyes locked on Rarity’s cock as it grew harder and harder by the second. “Are you sure you don’t want to spend some time researching this side-effect with me?”

Rarity chuckled at how persistent her friend was being. “I’m fine. I just wish I knew how to control this… thing better. And me becoming fully aroused in front of you is a little awkward, yes, but…” Rarity bit his lip and grinned at Twilight. “It’s kinda hot. Actually having my own penis growing feels... it feels nice in a different sort of way.” He yanked a pillow over his face as he blushed harder than ever before, making no effort to hide his erection anymore. He lowered the pillow a bit as he looked back up at Twilight. “And as for dealing with this new anonymous client today… I guess telling them the truth, that… my condition is only temporary would be the best course of action. I just wish I could figure out how to make my, for lack of a better word… penis soften so that I don’t have to do business with it fully erect.” He buried his face back into the pillow as he groaned.

“Well, I guess that your body reacting to its new parts would result in such a thing,” Twilight said as she levitated a quill and a piece of parchment over to her. After several moments of her quill scratching against the parchment, her ears cocked to the side as she heard footsteps behind her. She looked over her shoulder and saw Spike walking into the room, holding a platter with three steaming cups of tea on it. As soon as his eyes fell upon Rarity, his eyes went wide as he froze in place. Before Twilight could even start to open her mouth to explain, he slowly set the platter down on the floor and bolted from the room. “Great… looks like I have some explaining to do...” Twilight ran a hoof over her face.

“Huh? Why?” Rarity tossed the pillow aside and looked up at Twilight, his ears laying flat on his head.

“I think Spike just saw your... dick.”

“...Oh. I see...” Rarity licked his lips as his left ear twitched.

“...Yeah.”

“Well, I hope you have fun with that.” Rarity slid off of the couch as he felt his dick start to soften. “I think it’d be best if I went home before everypony starts running their errands. It would be so... naughty if someone saw me walking through the center of town with my new... cock swinging about like this.” He looked down and saw his cock start to harden again, and as it finally reached full-mast, it bounced against his belly, dripping a little bit of pre-cum from its tip. Rarity looked back up at Twilight and smiled sheepishly, hoping that she wouldn’t pick up on the fact that he loved that sort of stuff.

Twilight simply smirked.

Damn... Rarity thought. “Like I said... I should go. We should reschedule getting dinner later in the week, though. I was looking forward to spending some time with you again.”

“Of course, Rarity.” Twilight nodded towards the front door of her castle as she led Rarity out.

“Do you want something to cover up? I might have a shawl or something like that laying around here.”

“A shawl?” Rarity snorted. “I would never be caught dead wearing such a horrid thing. I’ll be fine. Besides, it’s not like Ponyville is devoid of stallions, right? I doubt ponies would really take notice of me.”

“Suit yourself, Rarity,” Twilight said as she opened the door for her. “If you don’t change back into a mare tomorrow, just come back here tomorrow morning and we’ll figure something out.”

“Thank you, Twilight,” Rarity said as he trotted down the castle’s steps. He glanced down the path leading back into town, wondering if it’d be a good idea for him to just trot around the outskirts of town to get back to his place. Galloping around the town would be sure to bring a lot of unwanted attention, but so would trotting through the middle of town. Rarity sighed as he made his choice, choosing to go through the middle of town as it would be the shortest way home. After a couple flicks of his tail, he started making his way back into town.

Rarity made it a few blocks into town before he started encountering the townsfolk. He kept his head lower than usual, using his mane to hide part of his face. Roseluck waved at him from her stall, making Rarity almost pause to wave back. He was a usual customer of her’s since he liked to have fresh-smelling flowers in his workshop. Choosing to just ignore her, Rarity couldn’t help but feel the need to hide his cutie mark with his tail, knowing all too well that his cutie mark would easily identify him as Rarity. And since he wasn’t a mare anymore, that could easily draw unwanted attention.

As he trotted further into town, nearing the square, he started to hear hushed whispers. “Oh, look at that cutie over there…” he heard a familiar mare murmur to her friend. “Such a refined stallion; could he be from Canterlot? He looks so dreamy…”

Rarity blushed as he quickened his pace, leaving the two mares whispering to each other behind. As he spotted the boutique several blocks away, he felt something warm bounce against his inner thigh. His eyebrows furrowing in confusion, Rarity stopped and lifted his right hind leg and peered down. Oh my gosh… he thought as his eyes went wide. “How did I not feel it get so big?” he whispered to himself, staring at his fully-erect cock. His head whipped around as he looked for anypony looking his way, but thankfully, he found nopony. Lighting his horn, he wrapped a band of magic around his tip and held it up against his belly, praying that nobody would see.

He stuck to one side of the street, taking care to avoid anypony in his path. As he started trotting again, he couldn’t help but let a moan slip past his lips as he felt his magic stimulate the tip of his cock, making his hind legs tremble a little bit. Why does that have to feel so good? he thought, wishing that he knew how to teleport. In hindsight, he knew that he should have asked Twilight if she could teleport him back to the shop.

Many moments passed in silence as the boutique came into sight a couple of blocks down the road. His shoulders drooped in relief, and when he was only one block away, he saw a mare with a yellow coat and a vibrant mane walking up to his front door. “Drat!” he cursed, hiding behind a nearby building. He let his magic fade away as he peeked around the corner, his cock swinging back and forth until it stilled, throbbing a little. “I can’t greet them with… with… this!” Rarity closed his eyes and sat down, taking deep breaths. “Just think of unsexy things, Rarity… Come on… you can do this!”