“Um, Rarity, are you sure this is our business?” She had stopped just as she was about to knock on Fluttershy’s door, once again wondering how she’d ended up here.

“Oh, Twilight, now I admit the subject is a bit intimate, but we mustn’t let that deter us. It is our duty as close friends of Fluttershy to make sure she is properly taking care of herself.”

“It’s just such a personal thing, and I don’t think Fluttershy wants us thinking about her... personal hygiene like that.”

“Now, it can certainly be embarrassing but there is no use avoiding the truth. You and I both know the other has had their examination. All the other mares have!”

Twilight squinted at her. “Why do you know—”

“Unfortunately, there are just some things Fluttershy will have to get over for her own well being. Think of any number of the disorders she could be fostering: fissures, oncoming prolapse, hemorrhoids, colon cancer! For poor Fluttershy to fall victim to these, that would be the worst possible thing!” Rarity tossed her head back and put her foreleg over it in her usual dramatic pose.

Twilight only grumbled at the display, but couldn’t dismiss the validity of it. “Alright, alright. Let’s just try to be sensitive with her, okay?”

Rarity was all smiles, innocently batting her lashes. “Why, of course.”

Turning back to the house, Twilight knocked on the door. Fluttershy answered the door.

“Fluttershy, dear, we’re bringing you to get your bottom examined so you don’t have cancer!”

Fluttershy fainted.

Having woken Fluttershy up, they all sat around her living room, Fluttershy and Rarity on the couch and Twilight in a chair across.

“I’m sorry for the untactful arrival.” Twilight glared at a sheepish Rarity. “But it’s very important you get checked up. How else will you be able to stay healthy?”

“Oh, but I couldn’t do that. It’s too embarrassing.” Blushing heavily, the mare in question hid her face behind her mane.

“Well,” said Twilight concernedly, “did you at least get checked last year?” Fluttershy shook her head. “The year before?” Fluttershy had to shake her head again. “Ever?”

“Um, when I was in junior high I had to for the knitting club.”

“Knitting club?” Twilight said dryly.

Rarity turned to the alicorn. “You see, Twilight, this is why I needed your level head. I’ve been badgering her all week to go and she’s refused just like every other year, which is why I at last had to involve you. Sorry, Fluttershy,” she apologized.

“It’s okay,” Fluttershy dimly nodded, forgiving Rarity despite greatly wishing she’d go bother somepony else right now.

Well,” Twilight asked, “what about the front?”

“...”

Here Rarity nodded her head proudly. “Yes, she’s kept up to date on her gynecological visits. She couldn’t get out of that.”

“At least that’s done.” Twilight seemed relieved to not have that on her plate. “But Fluttershy if you’ve already had that, why is this so difficult?”

Fluttershy stared at the floor. She could barely bring herself to explain, clearly uncomfortable talking about such things even with her close friends. She found herself at a loss having to describe why she did not want her rear closely examined. “...Oh, but, this is so dirty.”

“That’s all she says every time. “It’s dirty and nopony should be entering an exit.””

“Well, that will change this year,” Twilight said concretely. She had the power of logic on her side.

“I hope so. Tomorrow Colon Cancer Awareness Week will be over.”

“We can get her to go today.”

“Not today!” Both mares faced Fluttershy at her outburst.

“Um, if you would just give me time, and,” Fluttershy shrunk into her couch, unable to believe what she was speaking about. “I’ll, I’ll go next week for my... examination. I promise!”

“Fluttershy,” Twilight tried to reason, “It’s better to go today. Everypony knows it’s Colon Cancer Week and you waited until the last day. If you go next week, it won’t be free of charge.”

“That is a rather poor decision. Even if you can afford it, there’s certainly no reason to waste the bits.”

“But I can’t possibly let someone... look there. Not today, I haven’t showered. I’m not ready,” Fluttershy said, hoping they would buy it. Maybe she would too if she could work up to it. She’d been carefully dancing around it with Rarity like she did every year and had thought she was almost off the hook.

Twilight interrupted her thoughts. “Fluttershy, you can shower before you go. We’ll wait. Besides, they have cleaning facilities at the clinic anyway for you to use. It isn’t going to be any different on Monday than it will be today.

“But, but, I’ll be more prepared,” she weakly insisted.

Twilight smiled and shook her head. “Somehow, I don’t think so.”

Fluttershy opened her mouth but no more excuses came to mind. There was nothing she could say to placate them. The battle had been lost when she allowed them inside. Twilight seemed to notice and Rarity was clearly looking victorious.

She couldn’t be angry. They only wanted what was best for her. She should be honored to have friends who cared this much about her health to push her. Even if it was embarrassing enough to die. Fluttershy hung her head in defeat, smiling softly despite herself. “Okay. I’ll go.”

Twilight and Rarity escorted Fluttershy to the clinic, mostly to be sure she went but also to help ease the experience. After checking her in, they waited in lobby, both mares trying to be supportive to Fluttershy who was a bundle of nerves. It did little to help and she squirmed in her chair with eyes on the clock.

Too soon the door to the back and all its horrors opened.

“Fluttershy? We’re ready for you now,” a mare’s voice called.

Twilight to her right put a hoof on her shoulder. “It will be over before you know it. If you want we can go in with you, or wait out here and give you privacy. It’s your decision,” Twilight smiled encouragingly.

Fluttershy thought that was a little weird of her to offer. “...I think I would feel better if you waited,” she managed. As nice as moral support was, she certainly didn’t want an audience.

“No problem, darling,” Rarity was quick to reply, giving Fluttershy a look of encouragement as well. “Go in there and give ‘em tartarus.”

She nodded faintly, heading for the open door.

“What was that, you wanted to watch?!” she heard Rarity loudly whisper.

In the hallway Fluttershy sweated as she saw which nurse she was given, a white earth pony with pink hair in a bun. Nurse Redheart.

She supposed it was better than one of the stallions, but still there was no question Redheart was the prettiest nurse on staff and that did little for her anxiety. She’d seen Redheart around town, Ponyville wasn’t that big, but little more and usually her gynaecological visits, which were bad enough, were handled by Nurse Tenderheart. At least she was familiar with Tenderheart. And now another pony was going to look... down there.

Redheart stood there smiling in a little nurse outfit. “Fluttershy! Glad you could come in.”

Fluttershy couldn’t meet her gaze, staring at the floor thinking of what was to come. “Um, is there... a reason why I’m not seeing Nurse Tenderheart?” she asked as politely as she could.

Nurse Redheart didn’t seem perturbed as she lead her down the hall to the exam room. “She’s busy with another patient. I hope you don’t mind being stuck with me today?”

“Oh, not at all!” Fluttershy quickly assured.

They stopped outside the room, Redheart opening the door for Fluttershy. “Good! Well, here we are. You’re up to date on your checkups so all we need is this exam and then you’re out of here.”

Redheart watched Fluttershy shyly make her way in, eyes on the flanks she’d be working with.

The pegasus stood awkwardly in the center of the room, next to the examination table she assumed she’d be using, which was padded and had a pillow.

“So, ready for me to stick this up your butt?” Nurse Redheart grinned, walking by and picking up a stomach pump from the counter.

“Eep!” Fluttershy almost threw herself under the table.

“Sorry, sorry, only a little medical humor.” She said watching the nervous mare blush adorably. She felt a little guilty but it was so precious, and she tended to be playful with all her patients.

Getting more serious, Redheart clarified, “No, this is what I’ll be using.” She held up in a hoof the real tool, a small metal prod with a slightly bulbous end.

Fluttershy peeked from her hair.

“Not so bad, right?”

“Um, I guess so,” Fluttershy muttered, her face dominated by red blush.

“Now, if you could assume the position on the table for me, and we can get this started.”

“Assume the position?” Fluttershy said blankly, not liking the sound of that.

Redheart batted a hoof. “Another joke. It’s what they tell inmates when they need to check their cavities for contraband.”

“Oh.”

“It means, bend over on the table please.”

Fluttershy felt uncomfortably warm but was unable to think of anything to stall, knowing it was inevitable and she was already here. She complied, mounting her front half on the exam table and laying her belly on the padding, pretending to be anywhere else as she shyly stuck out her butt.

Redheart herself felt warm in a different way at the sight of the slim ass perched out to her, soft and unhardened yet toned. She knew Fluttershy had been a model before, and now she could see why. It wasn’t particularly big or round, but graceful in that way of her natural beauty, curves in all the right places but without excess.

But the real sights were currently hidden by her flowing tail. Eager to get her first look, Redheart reached out a hoof and tried to brush away the pink obstruction. It stubbornly stayed in place. She tried again but the tail remained fixed to guard the secrets below.

Redheart frowned. “You’re gonna have to move your tail if we want to get started.”

“Oh, sorry...” Fluttershy said, making no motions. Her tail remained firmly between her legs.

Redheart tried a different tact, her tone growing soothing to ease the pegasus’s discomfort. “Hey, nothing to be ashamed of. Everyone has one, right?”

“...Yes,” Fluttershy reluctantly admitted, the thought bringing up embarrassing images.

“And I’m sure you cleaned yourself up nice and thoroughly.”

Still red and staring at the wall, Fluttershy nodded vigorously.

“See? There’s nothing to be nervous of, I’m just going to check that everything’s working properly. I’m not going to judge you. So can you move your tail for me?”

“Okay, I’ll try.”

“There we go,” she said, pleased to see the tail slacken. Delicately Redheart moved her hoof and lifted it to the side where it stayed. She almost teasingly whistled at the sight of Fluttershy’s pink ring, but thought better than to go back to square one. It clenched nervously.

Fluttershy’s asshole, like the rest of her, was dainty and nubile. Soft and bright pink in the center of her buttcrack. It looked like had never been used before and she found herself excited to pound that little hole.

Redheart blinked at the sexual thoughts. Where had that come from?

She instead tried to focus on the job. Redheart brought the tool down her crack, poking at her anus and finding it still too resistant. Gently stroking the pegasus’s round flanks and spreading her cheeks, she assuaged, “Fluttershy, you’re still wound up so tight. I need you to relax for me.”

The pegasus mumbled unintelligently.

“There, there, just let your muscles unwind.” She continued pushing against her tailhole and smiled as the sphincter loosened up enough for her tool to slide partway in.

Fluttershy cringed as the cool metal touched her anus. She rested her head on the table and braced herself at the sensation of something long and thin entering what should be an exit only, poking in odd ways. It was actually kind of pleasant.

Fluttershy’s wings erected as the tool slid in deep.

“See, I think you're liking it!”

Fluttershy cringed in horror as she felt the status of her wings, but was unable to move further from her compromising position. “Oh my gosh, I’m so sorry! I don’t know what’s wrong with me,” she apologized, once again covering her face in her hooves.

Redheart immediately admonished herself for teasing the poor mare again. But it was difficult to resist, Fluttershy was just so cute when being teased. She stopped her movements to again stoke Fluttershy, whose anus had once again tightened. “Sorry, I shouldn’t have said anything. It’s okay. It happens to a lot of ponies, it’s a natural reaction.”

Fluttershy calmed at her words, lying back on the table and untensing her hindquarters. It was just like at the spa, she told herself. Just a little more exposed.

Redheart started up again, moving the tool in Fluttershy’s anus and examining her rectal walls. Starting near the entrance, she pressed it against, noting the firm muscles, slowly working her way around and then deeper in her search for hemorrhoids and fissures or other abnormalities. She quickly become absorbed in the prodding.

Fluttershy had stopped worrying about the erectness of her wings and was growing more comfortable, simply enjoying the sensations. She pressed her face against the mat and focused on the thin intrusion flexing her insides, almost like a message.

Redheart was pleased as everything seemed healthy down there. And to her delight, her ears began to pick up the soft sounds of Fluttershy on the table, little pleased whimpers whenever she pressed a spot with more pressure.

It was really starting to turn her on. Redheart was surprised at herself. Of course Fluttershy was an adorable mare but as a female nurse, she’d examined almost every mare in Ponyville, several she’d found quite attractive, yet never had the procedure felt as erotic as this.

Redheart couldn’t help the devious grin on her face as an idea began to form. Slowly, almost imperceptibly her motions became more sensual. Instead of the swift mechanical action, she took her time, lingering. She felt the rear in her hooves subtly squirm as she used the tool stroke Fluttershy’s insides.

Fluttershy tensed as the sensations gradually grew stronger, the probe more insistent. She’d not been expecting it to feel this good. “Oh... Oh!” Fluttershy’s voice was rising, not realizing she was making sounds out loud.

Redheart saw her vagina quivering, already wet from the experience and puffy. Unfortunately, that was off limits for this visit, so she continued to pour her attention on Fluttershy’s anus, working the hole.

And just as Fluttershy seemed to be getting really into it, Redheart withdrew. Fluttershy shuddered as the tool slid out her tailhole. She almost muttered in disappointment but remembered herself, and she was glad Nurse Redheart couldn’t see her face. This visit was much more enjoyable than she’d imagined. So she rested patiently on the table, still breathing a bit heavily from the stimulation, waiting for whatever was to come next.

Redheart stared at her soft yellow butt and then at the flexing pink anus, pulsing from the sudden emptiness and just begging to be filled again. She repressed the most animalistic urge to bury her face and sniff deeply. That beautiful butt was all hers to play with.

She moved around the table, opening a drawer and sorting through it. After a few moments she pulled out a new tool, an adjustable metal speculum.

“Well, Fluttershy, now we must proceed with the next part of the examination.”

Fluttershy looked at it apprehensively, thinking it appeared more insidious than the last, but giving no protest. She laid her head in her hooves.

Just like before Redheart slid it in Fluttershy’s waiting anus, but this time instead of maneuvering she began twisting the screw on its side, widening the circumference.

Fluttershy shifted on her hindlegs at the uncomfortable sensation. This tool was already wider than the other one, and it seemed to be getting bigger. She grunted as she felt her asshole stretching. “Unh... what is this part for?”

Redheart continued opening it slowly, more than was actually necessary, fascinated at how wide Fluttershy could go and wanting to prepare her for what she was planning next. Fluttershy’s small butt was gaping now.

“Oh, just flexing your muscles. You want to keep them nice and strong to avoid hemorrhoids, or worse, prolapsing.” Turning on the little light, she added, “Also, to get a good look inside.” And with that she quickly scanned the color of Fluttershy’s inner walls. Satisfied to see everything a healthy shade, she was eager to move on.

Technically this would be the end of the examination, but seeing as Fluttershy had always put it off she wouldn’t know that. Now was time for fun and she had just the thing.

Redheart reached into the corner cabinet and took it out, a red eight inch butt plug flaring into a wide base. Why that was kept here was a long story, but now that Fluttershy was nice and stretched Redheart was going to use this big thing on her. And it was big, but she was sure the pegasus could take it. She was excited to find out.

Letting Fluttershy see, she held up the rubber cone. “Next up is this little thing,” she said, knowing ponies less jittery than Fluttershy would be nervous.

“Oh my...” Her ass immediately tensed up, hole tightening closed. That did not like look it would fit in there.

Redheart advanced once more to Fluttershy’s backside.

Fluttershy had to admit the last two tools had not been so bad, but this was a different matter and unlike the others that did not look medical. Tail between her legs, Fluttershy shrank into the table. “Just, um, are you sure all this is part of the exam?” She nervously asked.

“Of course it is,” Redheart said sweetly, unable to repress her wide smile. “I’m certified. Now don’t you worry about a thing. Just lie back and let me finish up.”

Like before, she began by delicately prodding Fluttershy’s ring before wedging it in. It did not go far, being tightly resisted.

“You’re going to have to relax again, Fluttershy.”

“...I’ll try,” Fluttershy said, still apprehensive about its enormous size. But she tried to ease back, remembering what it was like before. Surely Nurse Redheart knew what she was doing, if she said this was part of the exam then everything would be fine, her rectum would accomodate.

Her tailhole immediately constricted again as thoughts of it ripping open flew through her head.

Redheart could tell Fluttershy was still doubtful, her rear all tensed again. She’d have to comfort her again. She rested her spare hoof on Fluttershy’s ass and softly began rubbing, kneading the buttcheek as she traced under the base of the tail and her sphincter with the point of the plug.

“Nothing to worry about, Fluttershy. It’s just like before, only a little bigger. Think of how you enjoyed the probe.”

Fluttershy’s tail twitched. She felt the plug poking again, feeling good against her ring of muscle, and remembered how great it had felt before. That calmed her a bit. Slowly her muscles began to relax again and her anus opened at the teasing.

Seizing the opening, Redheart slowing inched it in. “Don’t worry, I’ll go slow,” she soothed as the pink ring stretched and made room for it, red rubber disappearing inside. There was still resistance yet not enough to stop the plug which kept going deeper.

Fluttershy shifted her hindlegs, widening her stance. “Oh my,” she grunted, feeling fuller than ever as her ass was stuffed, rectum spreading wide. She felt her face flush and she grimaced satisfyingly as pleasure spread through her up from her bottom.

Redheart marvelled as her ass took it, far deeper than she herself could ever hope to take. Finally she just sat back staring satisfied at Fluttershy’s butt spread and her stretched pink asshole pulsing, having taken the toy almost all the way to the hilt. Almost eight wide inches. Grateful Fluttershy was faced the other way, she touched herself below at the arousing sight, finding herself just as wet as she could see Fluttershy was.

She gave it an experimental push, finding little more give. “How is that?”

“It feels like I have to shit,” said Fluttershy, never having had her ass so occupied and sending shivers of pleasure when she clenched. She was not sure why something so big was needed but she was no longer complaining. This was much better than the probe.

Redheart blinked at the unexpected vulgarity, but it only spurred her on. It brought to mind her own experiences with the plug and it was hot that Fluttershy had the same thing now buried hard in her ass, giving her pleasure, thoroughly cleaned of course. She slyly said back, “But it feels great, doesn’t it?”

“Ngh, yeah...”

“It’s about to get better.” With that, Redheart began to pull it out. Fluttershy softly whined at the absence, only for the toy to quickly push back in.

“Ohh.” Fluttershy groaned as the process repeated, like scratching an itch. Redheart continued to thrust it steadily faster, burying it far in her asshole. Fluttershy blissfully bit her lip at the penetration. It felt so good pounding her ass with just the right amount of pain.

Redheart couldn’t believe it. Even at the speed she was going, Fluttershy’s pink hole could take so much, greedily swallowing each time. She could only imagine how it felt. She abandoned stroking herself to tug on Fluttershy’s tail with her free hoof, watching her tremble.

Fluttershy’s tongue lolled out of her mouth. A fire was quickly building in her depths, the toy rubbing her ridges and stretching her inner muscles in all the right ways. She hadn’t heard of mares orgasming from something in the butt but it seemed she was about to. Fluttershy pressed off the table back, she couldn’t help moving her pelvis to it, pushing against the plug as Redheart slid it back in, just trying to get it deep in her hole. Redheart wasn’t going far enough, she was so close.

“Harder,” Fluttershy pleaded in heavy breath, panting.

“Harder? You want it harder,” she played dumb, “in your ass?”

Fluttershy gently moaned, rocking her hips, too absorbed to be embarrassed, just needing her anus stuffed to the brim. “Oh yes, in my ass, push it in as deep as you can!”

Fluttershy was close and she was about to get a frontrow view. Bringing her face closer, Redheart obliged, completing two more quick strokes and then shoving the plug all the way in the asshole as far as she could.

It slammed so satisfyingly up her rectum. Fluttershy grasped at the table, face screwed up in pleasure as it shot through her and she orgasmed, a blast of girlcum squirting in Redheart’s face. “Mmmm!” was the only sound she made in her wave of euphoria.

“Wow,” Redheart muttered, impressed at the display.

Fluttershy was strewn blissfully across the table, tongue still hanging out with a lazy grin on her face. Marehood and plugged ass still on full display. Slowly the endorphins faded and she drew out of it.

Redheart wiped her face on her sleeve and gently pulled out the cone, then stood back and admired her work. No matter how long she looked the view of Fluttershy’s butt did not diminish. Smiling, she said, “Fluttershy, I’m pleased to announce you have a clean bill of health. And a strong orgasm reflex too, if I may say so.”

“I feel healthy...”

Fluttershy gasped as she remembered where she was and what she’d just done in the doctors office. “Eep!” Crimson again, Fluttershy self-consciously picked herself up and sat on the table, legs pressed tightly together.

Before she could start down that path again, Redheart waved a hoof. “Oh, don’t be embarrassed. Remember what I said? It’s okay to enjoy it, Fluttershy, a lot of mares do,” she said, tactfully omitting she didn’t usually get mares off during the examination. She was going to be having good dreams about this tonight.

Fluttershy considered the words of the mare who had just shoved things up her butt. “...I did enjoy it. A lot,” Fluttershy quietly admitted, out of her depth yet finding herself actually not so mortified over such an intimate experience with her nurse.

In fact she couldn’t help but look at Redheart again, past all the embarrassment and apprehension, noticing her bright sapphire eyes. The pretty way her mane framed her face and soothing smile. She’d never really been one for mares, yet she was so attractive and the gentle curves of Redheart suddenly seemed very alluring. And the orgasm had not been bad either.

“Good.” Redheart flashed her teeth proudly. “You were a great patient. Well, the exam is all done, and you may step back the hall, you know where the main room is. Hopefully next time you won’t be so nervous coming in.”

“Don’t worry, I won’t,” Fluttershy said, unable to think of anything else. She didn’t know if she should even say anything else, still feeling strange. She guessed this was it then. Lowering from the table, Fluttershy awkwardly began to make her way to the door.

Redheart caught her eye. “And maybe give me a call sometime?” She was holding out a slip.

Fluttershy blinked and once more she was dancing on clouds and her butt felt delightfully sore. “You want me to... Yes! I’ll be sure to,” she nodded her head grinning.

Fluttershy weightlessly strode into the lobby, head high and not remembering to be shy.

Rarity and Twilight both turned their heads smiling at her approach.

Having been waiting for some time, Rarity quickly stood from her waiting chair. She did not remember it taking this long. She greeted Fluttershy before Twilight could say anything. “Well, dear! How was it? Not as bad as you worried, I hope?”

Fluttershy beamed. “I got her number.”