Spike tittered to himself, scampering below Rarity’s desk. Normally, such an act would have been impossible, even given his pygmy-like size, but the situation was an extraordinary one.

Two days prior, he’d sit in on a guest lecture, presented by Zecora, on the various uses of potion making. He’d been relatively unimpressed with her concoctions and elixirs, until she mentioned how poison joke could be distilled and enhanced for a number of uses. Thinking back to his friends’ initial encounter with the zebra, he recalled how Applejack had been reduced to the size of a field mouse. As entertaining as the memory was, it gave him an idea. After the lesson, he’d asked Zecora if an elixir could be created to shrink somepony or, in his case, a dragon. The striped equine not only affirmed that such a creation was possible, but even walked him through the process.

Under the zebra’s knowing gaze, Spike mixed a number of ingredients, carefully blending them into a tincture, before distilling them into a little, crystal phial. When asked what he intended to use it for, he’d simply replied that it was for a joke; a half truth, but one which Zecora had bought hook, line, and sinker. Thanking her profusely, the dragon quickly scurried away, with the sealed bottle of potion in claw.

Hastily waddling off to Rarity’s class, Spike knew he didn’t have much time. It would only be a matter of minutes before the unicorn’s lesson on generosity began, so he had to act fast. Uncorking the bottle, the dumpy dragon downed the contents and waited. Zecora had told him the effects would be immediate, but only lasting an hour or so. Sure enough, Spike began to shrink. Smaller and smaller he became, until he was approximately the size of a thimble.

Concealed beneath Rarity’s desk, Spike poked his head out, as the school’s bell began to angrily announce the change of classes. If there was one thing he knew about the snow white unicorn, it was her routine. As such, he’d devised the perfect places to situate himself to longingly gaze upon her svelte figure. It wasn’t long before the students began filing into the room.

‘Wait for it,’ Spike thought, clutching one leg of the table he hid beneath. Sure enough, Rarity came sauntering in, closing the door behind herself. Looking up at her, as she trotted over, he practically swooned. The mare, who was normally a fair bit larger than himself, looked absolutely titanic. Every aspect of her beauty was magnified to the nth degree; from the generous curves of her derriere, to the way her bosoms jostled slightly on her abdomen, everything about her was just perfect. As she trotted past, moving in front of the desk, Spike moved to his second chosen location.

Under normal circumstances, Rarity would enter the class, trot to the far side of her desk, talk for approximately fifteen minutes, then sashay through the rows of students, giving each of them a bit of attention. This meant that, if he wanted to maximize his viewing potential, Spike would need to soar onto her chair. It was just out of the way enough for nopony to noticed him, especially because all the eyes in the room were locked on the resplendent unicorn. Tottering along, as fast as his legs could carry him, the micro dragon moved to the aforementioned seat. Unfurling his wings, he flung himself skyward and towards the cushioned pad that was to be his perch. Spike panted slightly, as he persisted. He’d never really been in the best physical shape, so the endeavor was far from easy; yet, the sound of Rarity’s lilting voice spurred him onward. If everything went as planned, he should be able to spend most of the rest of the lecture from that position. Sadly, fate would have other plans.

Landing on the padded seat, and sweating from exertion, Spike wheezed. The flight had been comparable to ascending a mountain, what with his current miniature state. Wiping his brow, he turned, and his heart skipped a beat. There, descending with glacial speed, was Rarity’s colossal rump. His pupils shrunk to pinpricks, at the sight. Like a deer caught in the headlights, or, apropos, a dragon faced with a mammoth marehood, Spike stood transfixed. It was like looking at the face of god, so awe inspiring was the sight. The unicorn’s pure white fur thinned ever so slightly around her entrance, revealing the pink, succulent lips of her labia. The silken folds of her sex were magnified to immense peaks and valleys, warm and inviting under his unworthy gaze. A primal part of his brain screamed for him to move, to flee for his own good, yet he could not. Overridden by lust and the sheer captivating might of the pony’s godly muff, he was paralysed. As the heat of Rarity’s marehood radiated across Spike’s features, he realized he’d made a grave miscalculation.

“Today, class, I believe I’ll allow each of you to have a self-study session,” Rarity began, easing herself down. “I’m feeling a bit exhausted, and I’m sure each of you wouldn’t mind some time to prepare yourselves for finals. I’ll just be going over a few things, should you need me,” Rarity crooned, lowering herself onto the seat. Though she was fatigued, it wasn’t due to anything she’d freely admit to her pupils. She had, in fact, been warding off her heat, for the past few days. The night before, she’d lost track of time while reading Fifty Shades of Hay and masturbating furiously. Yes, she realized it was a clichéd and poorly written “romance” novel but, by Celestia, something about the silly scenes of debauchery and hedonism really set her loins ablaze. Why, the mere thought of those lewd ponies and their masochistic tendencies send a tingle through her marehood.

Spike, finding himself entombed within Rarity’s sopping wet and sinfully hot snatch, was at a loss. On one claw, he would have died to be in that position, albeit at a normal size and only with his pair of dicks; on the other, he was terrified and had no idea what to do. Fortunately, although inexplicably, there seemed to be just enough air within her gash to keep him from an untimely demise, but he still needed to escape. Squirming about, the puny dragon sought to reorient himself. Just as he began to writhe about, his world started to move.

Rarity fidgeted uncomfortably in her seat, crossing and uncrossing her legs. It almost felt like something was inside of her. The sensation was far from unpleasant; quite the opposite, in fact. Sadly, whatever it was, wasn’t doing her estrus any favors. Glancing out over her classroom, to ensure nopony was paying her any mind, she scooched the chair behind the desk. The subtle move was a tactical one, as it shielded her entire lower half from any prying eyes. Shamefully, a hoof crept to her groin to knead the tender and sensitive flesh of her loins. As scandalous as it was, there was little else she could do; her body simply demanded attention, overriding her better judgement and leaving her to stroke her mare bits.

The velvety walls around Spike constricted, firmly squeezing him in place. Unbeknownst to the draconic lad, he was situated directly on top of the mare’s g-spot. As he was seized in the vice-like grip of the unicorn’s carnal canal, writhing helplessly, he directly stimulated Rarity’s erogenous zone, only complicating matters. Whatever she was doing must have had her pretty worked up, given the amount of feminine nectar she was exuding. Why, he was practically drenched in the stuff, not that he minded. Gulping for a breath, Spike accidentally inhaled a portion of her essence. The taste, cloyingly sweet and slightly astringent, coated his palate and caused him to cough uncontrollably. His fragile mind, trapped between the juxtaposition of possible death and finding himself buried deep within his heartthrob’s naughty bits, struggled to cope with the situation. Despite himself, and possibly due to some survival instinct, his twin tools emerged to helplessly grind against his inadvertent captor’s insides.

With a sigh, Rarity rested her head against the desktop, as she continued to stealthily pleasure herself. Peeking out over her classroom, she made sure to keep an eye on her students, lest any of them notice her somewhat odd behavior. She couldn’t put her hoof on it, but something about getting off, on this particular occasion, felt especially good. Perhaps it was simply the disgraceful act of diddling herself infront of a room of her pupils, or maybe it was the fact that her marehood had been brutalized the night prior; either way, it was simply divine.

The cramped confines of Rarity’s vagina rhythmically clenched, seemingly drawing Spike deeper within the pony. Out of options, and losing hope of escaping, the minuscule reptile flung his inhibitions to the wind. If he was going to die inside a unicorn’s snatch, he may as well go out with a bang. Throwing his arms wide, he clutched at the slippery walls surrounding himself. Bucking his hips, he relentlessly jackhammered the dragonic duo of dongs into Rarity’s g-spot, with reckless abandon. Grunting furiously, and running low on oxygen, he endured, insistent on getting off one last nut before kicking the bucket. He wasn’t sure if this counted as losing his virginity, but he sure as Tartarus would like to think so.

A shiver went up Rarity’s spine, as an immense pleasure stirred deep within her loins. Biting her lip, to quell any blissful moans from escaping herself, and alerting the class to her salacious activities, her motions quickened. At a frantic pace, her hoof ground over her winking and slickened clit. As surreptitiously as possible, she ignited her magic to tweak and tease her nipples, below the desk’s surface. She knew she wouldn’t be able to last for long, given the meteoric rise in pleasure, but she hoped she wouldn’t make too much of a mess.

Plowing the nerve bundle that was the most sensitive spot in Rarity’s vag, Spike soldiered on. Seeing as how it was his first time inside of a woman, in an all too literal sense, his fortitude was left wanting. With a piercing cry of ejaculatory glee, he hosed down the mare’s interior. Short of breath, and on the verge of blacking out, a ruinous euphoria overtook him, just as his minuscule frame was besieged by a tsunami of fluid.

Stifling a throaty groan, Rarity’s body shuddered. Her thighs quaked, and her marehood violently contracted, as she was overwhelmed by rapturous ecstasy. Gnawing upon a hoof, she restrained herself from crying out. A cascade of nectar erupted from her snatch, seeping into the cushion of her chair and dribbling to the floor below. Unfortunately, she wouldn’t be able to enjoy the post orgasmic euphoria, as a sudden movement drew her attention. Yona, the little yak student, was trotting over with what appeared to be a hat or perhaps a stocking. Honestly, she couldn’t tell, given the bovid’s absolutely horrid taste and outlandish Yakyakistani style. Regardless of what the garment was, she needed to address the issue quickly, lest her unseemly and sticky mess be discovered. Dragging her horse pussy over the padded corner of her seat, to wipe away most of her juices, she coolly walked out to greet her student.

Spike heaved air into his chest, breathing deeply, as he lie on the cushioned surface of Rarity’s chair. Wearily looking up to the ceiling, he prayed a silent thanks to Celestia. Were it not for the torrential nature of maregasms, the unicorn’s cunt would have likely been his grave. Making a mental note to bring scuba gear or a seapony transformative potion on his next foray into an equine’s sex, he pushed himself up. Doused head to taloned toe in Rarity’s spunk, he thanked his lucky stars that his draconic sexual prowess had caused his captor to climax. Spreading his wings, Spike drifted down to the floor to plot his escape. He had less than an hour to evacuate the room, to avoid returning to his natural size.

Dashing over the polished hardwood floor, Spike escaped unnoticed. He desperately needed a shower but, more importantly, he wanted to reach the privacy of his room, prior to the potion wearing off. Being positively shellacked in the pony of his dreams’ gooey and rapidly cooling ejaculatory fluids wasn’t an experience he’d ever expected to have, so he was going to bop the boa at least once, before he cleaning himself. Although he may never suffer through the same sort of adventure, especially because he hadn’t been planning on it, Spike was going to jot the entire obscene ordeal down in his diary.