Experiments in Penile Magic

"Hmm, the instructions look clear enough."

	Princess Celestia turned the sheaf of parchment over, checking through the carefully written script that signalled Twilight Sparkle’s writing. Never one to lie on her laurels, the mare had been hard at work using her alicorn magic to fuel her research; the parchment Celestia smiled down upon bore the latest results. She had had the pleasure of sampling those same results not long ago with her sister at the royal baths.

	"Be seated comfortably and without clothes so you can concentrate on your body."

	That was probably the easiest part. Legs folded, wings resting at her back, Celestia closed her eyes and thought on to the next part – arousing herself. It was a necessary consequence of stimulating the genitals so the nerve bundles could be shifted; thoughts of sharing her own application of this spell with Twilight quickly saw to that and in moments the Princess was shivering lightly and rubbing her hooves together.

	Focus, the word sped through her thoughts like an arrow. Focus one’s magical energies at the genitals, create an elongated field and begin the proper alterations for a polymorph spell. All quite simple except that instead of casting a true polymorph spell, it brought in parts of restorative magic and even elements of pure alicorn magic – in that form, left uncontrolled its effects could be devastating.

	The first sensation was a shock of heat, lancing from her pelvis. Celestia gasped, digging her fingers into the fabric of her bed; focus, concentrate on the energies, not your body, the heat faded and she resumed her work. It took shaping, moulding the energies until she felt a warmth emanating from her that indicated it was right. Then the tiniest sliver of alicorn magic to act as a catalyst and finalise the process.

	Pain. She had expected pain; so often restorative magic had some painful side-effects at least but this was anything but painful. Divine, intoxicating, maddeningly pleasurable, all the words failed her in that one intense moment between the spell being enacted and finalised. Celestia’s fingers dug further into the bed, pushing herself further to resist the temptation of letting the spell fail and enjoying this feeling.

	It was over in an instant that lasted agonisingly too long. With all the flair of a passing breeze, the last of the magic worked its will and dissipated, leaving Princess Celestia to heave a great sigh and fall back onto her bed. For moments longer she lay there, letting the dizzying sensation from such an intense spell worked upon herself pass.

	Still catching her breath, Celestia slowly pushed herself back up and looked down over her body – sure enough, jutting out from her pelvis was a long, pale pink penis that bobbed gently in time with her heartbeat. Just below it were two fat white testicles and for a moment she could only look on in wonder. The spell had worked. It worked!

	With trembling hand and growing smile, Celestia reached out to that cock and ran a finger from the front of the head to the back. Her breath caught in her throat and her other arm—still propping her up—threatened to give out. She’d done just the same thing to Twilight, ignoring the poor mare’s pleas for her to stop, that it was so sensitive even simple actions like that could set her off. Instead, Celestia turned to examining it, admiring the medial ring near the base, the small veins that protruded from it and the way with each passing moment more and more precum formed at the tip.

	No stranger to having seen other stallions, she knew that the spell had formed something of a respectable length. Enough so that it looked like if she were to simply lean forward she could garner a taste of it. What would it be like? Surely she owed it to Twilight to ensure it was good enough before sharing.

	"Just a quick lick," she muttered to herself, leaning down.

	All such thoughts vanished at the sound of her bedroom door being thrown open and Luna stepping through.

	"Sister, we object to thee pilfering our liquid soap. ’Tis a rare treat we reserve for… for…" Only her crossed arms covered her breasts but the rest of that sumptuous body—still glistening wet—was bared to Celestia. "So this is why thou wert so excited at the word of Twilight Sparkle’s missive."

	"Luna! I… I can explain!" Her face flushed with heat but she still couldn’t draw her eyes from the mare before her, especially as she stepped forward and took Celestia’s knees in her hands.

	"So thou shalt. Does this retain the sensation Twilight Sparkle’s appendage did?"

	As she was gently pulled towards the end of the bed, Celestia could do nothing else but shuffle forward, snapping her eyes away from Luna.

	"I believe so but… I haven’t had time to test that just yet." Luna’s raised hand stopped her from saying any more.

	"We shall be the judge of that."

	It took only a few more careful movements to slide Celestia to the edge and leave her legs dangling. One more and Luna had those legs spread wide, every inch of her sister now bared before her; Celestia’s long pink shaft bobbed under the scrutiny and she fidgeted her hands against her chest. Luna’s cool, smooth breath across the skin was heavenly and her fingers tracing slow lines along her thighs left her struggling to hold her balance.

	"Sister, contain thyself," Luna muttered darkly, lowering herself to her knees and moving close until Celestia’s legs were to either side of her, "remember the incident with Twilight."

	And she could, all too clearly – that purple rod spasming wildly, shooting hot strings of semen across them as the poor mare failed in suppressing her orgasm. The imagery did little to suppress Celestia’s own shameful thoughts of using her sister in a similar manner or the hope that her magical field might envelope her length and see her own load blown across that slender face.

	"Luna, please, this was only meant to be a quick experiment!"

	Uncaring, her sister’s hand cupped one of Celestia’s testicles and slowly clenched around it, slowly bobbing up and down. A satisfied hum later and Luna had moved on to the black base of the shaft, extending her fingers around it in a tight grip. Celestia could only gasp and catch her legs from wrapping around those blue arms but could still not halt the precum that pooled at the tip of her penis and quickly ran down its length.

	Both alicorns silently watched its glistening trail, winding its way along Celestia’s aching, twitching member until it fell against Luna’s fingers. With a crooked brow, the Princess removed her hand and examined it; sure enough, the consistency was just the same as Twilight’s. But there was still one matter that needed to be deliberated upon.

	Her sister was a strong mare, in body and mind and it was a quality that Luna had slowly shifted from feeling envy to admiration. That same strength was mirrored in the small throbs that ran through the pink member before her, in the way Celestia controlled herself; Luna shifted her hand further up the shaft until it met the medial ring and her sister was left quivering and biting her lip.

	"Dost thou protest against our ministrations?" Ethereal mane gently waved back and forth as Celestia shook her head. "We expected no less."

	Without having realised, Luna started stroking a hand along Celestia’s thigh, raising her other yet further along that twitching cock. From the corner of her eye she spied a white hand squeezing an equally white knee, starting to shake as she neared the thick head of the prick in her grip. Pre continued to spill from it, only making the job of sliding her fingers across it that much easier until they rotated around and ran over the head.

	"Lun-AH!"

	That heaving chest, mouth open in pleasure unrestrained and fingers twitching in delight – it was a sight Luna well recalled from their previous night’s exertions. Feeling devious, she ran her fingers back over the tip of Celestia’s member, cooing as the mare whimpered and just held her bucking hips in check.

	"We wish to feel thee, sister."

	In one, long smooth motion, Luna slid her hand along to Celestia’s opposite thigh and pushed her legs apart until there was enough room for her to shuffle forward until the pink rod rested against her breasts. It bobbed with each passing moment, tapping her chest almost in time to her own heartbeat and Luna sincerely hoped her sister could feel it. She had a way to be sure of it.

	Straightening herself, the mare took her sister’s member in hand, her breasts under another and slid the shaft up between them. It failed immediately, nothing keeping them in place but the little cry from Celestia was enough to convince her to continue. A little shuffle forward and her sides were nestled against Celestia’s thighs.

	"Canst thou feel us?"

	Here it was easier to draw Celestia’s cock down and lean forward until those rippling thighs forced her breasts together whereupon she could easily slide that member between them. She could feel it then – the thump, thump, thump of her sister’s heart. It drew her hand along a white thigh and around to rest on the small of her back, gently moving her out from the bed. Or so she tried; with the two locked together there was no movement save the struggle of Celestia’s cock to break free and Luna’s hand keeping it firmly in place.

	"Luna," Celestia whispered, her mouth parted in a long moan. With her sister’s hand on her back and no other movement possible she undulated her hips as best she could, sliding her penis through the warm grasp of her sister’s breasts.

	Despite her hopes to win out, Luna could only look on in consternation as Celestia simply dribbled more pre, instead of the riotous orgasm she expected. Even upon stroking a thumb over the tip of that pink member there was nothing more than a few more globs of precum expelled and while her sister did gasp and shudder it still wasn’t enough.

	"Art thou close?"

	Again, Celestia shook her head, still rocking back and forth.

	"N-No… I need more."

	Momentarily, Luna halted, caught staring at the sight of her sister’s shivering body; it was eroticism given form, her milk-white coat, slender neck, soft bosoms, an abdomen that was just at the right point between muscular and soft and yielding… And now, between those gorgeous thighs rested a cock that could—and would, she knew—put any stallion to shame. There was not another that could compare to her sister’s beauty.

	It left Luna splaying her legs and reaching a hand down between them to rub at a small damp spot. The other held that long pink shaft fast as, now closer, she could lean in to run her tongue lovingly along and around one fat, white testicle.

	Celestia’s arms finally buckled, the mare falling back onto her elbows as she could only gaze down to her sister lavishing attention upon her.

	Precum erupted from Celestia’s cock and Luna gladly lapped at what streamed down, slowly licking her way along the shaft, savouring each delicious inch until she crested the top and simply lay her tongue there. The skin was hot, the taste slightly salty and slightly sweet; Luna let her eyes fall shut as the sensations drove her fingers closer to a small, sensitive nub at just the right spot between her legs.

	"Luna… Luna, please!" It was hard to concentrate on that voice, hard to concentrate on anything save the throbbing cock at her lips and the heat that continued to rise within her. But it was maddening, achingly frustrating how Celestia continued to thwart her. "Oh Luna, please, I can’t!"

	Luna’s lips locked onto the rounded head of Celestia’s cock, drawing it into a long kiss as her tongue swiped back and forth over it. Her hand abandoned the shaft, instead rising to cup one of those alabaster breasts and tweak a nipple; anything, anything at all to push her sister over the edge. All it succeeded in doing was throwing Celestia to the bed with a warbling cry, her hands roving across her inner thighs as she warred against her desire to simply thrust her sister onto her member.

	A tiny whine escaped the Princess as she kept a thumb rubbing around the edge of her clit while stroking a finger along her lips; it was getting difficult to figure out which of them was becoming the more desperate. But it would be a loss, one against her constant victories if she allowed her sister to drive her over the edge. And it was with that thought that Luna stood suddenly, leaning across Celestia’s shaking body to glare down.

	"We… We shall ensure," she growled, only just holding her hips from simply dropping her onto the thick shaft below, "that thy orgasm is most fierce if thou dost persist!"

	Not even waiting for an answer, Luna landed back on her knees and bore down on that throbbing length. How? How was she doing it? How was the sweetness of her sister’s nectar being denied her when so many nights before it had been yielded with the ease of a single finger?

	Luna licked her lips and felt a new resolve grip her; before this evening was done she would have what she desired if she had to use every tool in her arsenal. And there were few so good as her hands, her long fingers quickly cupping Celestia’s testicles and wrapping around the base of her shaft while Luna’s lips descended on the head of the pink cock and wrapped it in a tight seal.

	Above, she could hear Celestia thumping the bed and took this as a sign that she had finally reached a turning point. She swirled her tongue on the head, bathed the shaft in saliva and suckled on one of those pendulous balls; precum spurt in thick gobs to land on her nose and cheeks but still her sister held out. Then the heat between her own legs grew too demanding and a hand had to be sacrificed to rub at her moistened lips, to stroke on the tip of her clit and try to stave off the worst of those growing aches.

	Even for one such as her, though, such things were not so easily set aside and with a grunt of frustration she rose back to her hooves to glare down at her sister. Her beautiful sister who she had been driving to the edge of orgasm with little success.

	"Up," she commanded, taking one of Celestia’s hands in her own and giving it a tug.

	Still heaving for breath, Celestia slowly pushed herself and with the aid of her sister, managed to stand on shaky legs, still shivering all over. She could only watch in silence as Luna climbed onto the bed, lying down on the spot where she had been. Her legs wobbled, the power leaving them at the sight of those blue legs spread wide and it was only quick thinking that saw her caught on the edge before slowly sinking to her knees.

	"Oh no… not this time!" Luna took her sister’s chin in her fingers and pulled it up upon seeing her licking her lips and leaning down between her thighs. "Thou art to cum and we shall see to it that is done!"

	Shuffling back on the bed, she took one of Celestia’s hands in her own and pulled, her sister crawling onto the bed to straddle her. Without further prodding, those hands came to rest on her thighs, holding them open as Celestia levelled her member against Luna’s moistened labia. Her sister looming over her, cock pressed to her and hands holding her wide – it was a sight Luna never expected to witness but sorely, silently hoped would be one that would grace her often.

	What Luna was not prepared for was Celestia sliding that turgid length forward, grinding it against her and leaving a long smear of their combined emissions along her coat. Had her legs not been held apart she would have clamped them shut and held her sister close, letting those delightful pricks of pleasure settle before anything else could be done. With Celestia firmly in control, however, there was not a moment to recover before her cock pulled back.

	"Cease, stop… We," Luna grunted, pushing herself up on her elbows, "W-We command thee to-"

	The last thing she expected was the rough thrust, Celestia’s hips meeting her own with a dull slap and that pink cock slipping over her. It was heavenly, experiencing her sister in this new way; for that one moment her mind slipped from her makeshift competition to simply enjoying these new sensations. It was like no toy could ever feel, hot, hard, vibrant with life and leaving her with the knowledge that it felt just as good for Celestia.

	But there was something she needed, needed as bad as she was sure her sister needed to enter her. All it took was a hand on that member, angling it just right to glide against the little nub of flesh that sat just above her labia. Luna threw her hand to her mouth, biting down on the fingers; it was bad enough that her hips were bucking beyond her control into Celestia’s grasp.

	Luna felt herself on the cusp of asking something of alicorn above her, something she knew would seal this whole ordeal; there was no chance to ask as Celestia descended, gently pushing her sister to the bed and nuzzling in against her cheek. Their hips simply ground together, Luna’s fingers finding purchase at the wrist of Celestia’s wing on her back. It flared out, muscles tensing under her grip as the mare shuddered.

	Warmth spilled over Luna’s stomach, moist precum drizzling onto her coat before slowly, shakingly, Celestia pulled back and held herself over the mare below. It was deliciously close, tantalisingly easy to work in, filling Luna only with anticipation. All forgotten in the instant Celestia spoke to her.

	"I wish to enter you, Luna." Her voice was uneven and caught between small gasps. "To make love to you, as you deserve."

	She held herself fast, arms trembling against Luna and the mare below welcomed her sister in a gentle kiss with a hand on Celestia’s head. It suddenly seemed so silly, such a pointless little game.

	"Please," came Luna’s response, as soft as her sister’s, "show us."

	It was not, as she had feared and expected, one violent thrust; it was not some lust-fuelled act of debasement but something slow, sensual and quietly loving. Her lips slowly parted as Celestia pressed herself down, bringing her sister into another kiss; their tongues danced together and both strove to stifle their cries of pleasure as they slowly brought their bodies close. When Luna shook, Celestia hooked a hand around her rear and held her. When Celestia felt herself about to loose her pent frustration, Luna held her hip and soothed that temptation.

	Their kiss fell apart as the medial ring of Celestia’s cock passed through Luna’s labia, eliciting a shiver from the mare; there was something no mere simulacrum could hope to capture. Neither could it compare to the wild heat, the throb of life or the warm, wet feeling of her sister’s precum spilling from the aching head of her cock. Then, at last, their hips met and both mares breathed a sigh of relief, still holding to each other.

	For a moment they held their positions, simply drinking in the other’s presence and the new sensations passing between them. With every twitch of her cock, Celestia’s fingers gripped on Luna’s shoulder and as time passed she began to rock her hips, her hands moving down to hold onto her sister’s thighs as she pushed herself off. That sensation of Celestia pulling out, of leaving her empty was something that left Luna pulling at her until with a single thrust she was filled again.

	Both shared a gasp, both unprepared for the intensity of that single movement but neither made to stop the other when Celestia quickly pulled out and thrust back again. There were no words spoken, no encouragement made or pleas for less when Celestia brought a hand down over Luna’s chest, over her abdomen and then just above her legs, to run full circle around her clit. It drew a shake from the mare, filling her with warming pleasure and moving her to encircle her sister’s back.

	That was, until Celestia tapped at her shoulder and pulled a hand from around her, taking it in her own and squeezing it. Both held onto the other tightly as Celestia picked up in her thrusts, pushing her hooves into the bed and lifting Luna’s backside to meet her. The mare below could only let her mouth fall open and grunts leave it as she focused her mind on the twin sensations of her sister’s cock and thumb.

	It was more filling than any of either of their toys had ever been, driving her hips apart as much as Celestia’s hands did with each thrust. The combination of precum and her own fluids firmly put paid to any difficulty in fitting it, Celestia using that only to her advantage in thrusting. Luna had felt this before, felt her sister’s meet her own in the haze of pleasure they would share but never before had it been at the end of her own member.

	The meeting of their bodies had become rougher with Celestia’s thrusts, that dull slapping turned sharper as their mixed fluids leaked from her sister and their thighs turned it to a fine spread across their coats. Was that what she’d done to her sister? Was the mounting tension she felt the same, only filled with the fear that it would be unfulfilled?

	Suddenly, Luna heard something like the tearing of fabric and her sister fell upon her, bottoming out in the process. For a second, both simply lay there, the sensations too intense to do anything else. It was almost enough to send Luna over the edge but there was something missing, some vital part that still held her back. Then again, when Celestia started to pull out she felt her pleasure mounting a crest, falling short just as that thick cock was pulled free.

	A long strand of mixed fluids ran between them until Celestia pulled away and placed her hands on her sister’s hips.

	"Luna… L-Luna, listen," she grunted, gently tugging at a leg, "I n-need you to turn over."

	Too far gone to resist, Luna could only weakly nod and do as she was bade, inching her body around to lie prone before Celestia. The feeling of two hands around her waist caught her off guard as did being gently pulled up. Realising what her sister had planned, she brought her knees up under herself and put her weight down on them. Those same hands slid over her hips and onto her buttocks, gently parting them.

	"Are… Are you okay with this? I won’t force you."

	Turning back, Luna’s eyes met with Celestia’s and saw all the love she’d seen reflected in them countless times before they’d shared their intimate moments. There was no doubt in her mind that she would remain unharmed, that there was nothing to fear so long as it was her sister who was in control.

	A simple nod was the signal and Celestia bent down, licking her lips. It was tempting to simply dive straight in, to feast herself upon Luna’s sweet taste but this was not something to be rushed. Her tongue traced a long line from the inside of Luna’s thigh to just outside her labia, catching the little splotches of mixed fluids that had been left there.

	Luna shuddered, burying her face into her pillow and letting out a long, low groan. That tongue progressed no further, thankfully and infuriatingly denying her any teasing darts of pleasure; instead it wound its way up and up, along her coat until it met with another, smaller orifice. There was not a moment’s hesitation for Celestia as she circled her tongue around the little puckered ring between those blue cheeks, moving closer and closer until she pressed down on it.

	"Eep!"

	There was nothing quite so delightful as those little squeaks from Luna and Celestia ran her tongue over and back along that ring, delighting in each one she won. She was careful to trail her palm across Luna’s labia, drawing a little of that delicious fluid along with her and another shake from her sister before rubbing it into the copious saliva already on her. A single finger gently worked its way against her rear, lubed up with the combination of fluids. Resistance slowly gave out and she inserted another finger and then a third, slowly working them deeper until she was satisfied.

	A quick tap to Luna’s shoulder drew a nod from her, one last assurance.

	Luna kept her teeth tightly clamped around the material of the pillow, breathing heavily through her nose. Her sister poked about at her rear until finding the right spot; the slow entrance was almost agonising, pleasure rippling from that rod that entered her. Finally free, one of her hands quickly lowered between her legs, stroking from thigh to thigh, teasing herself along with her sister.

	"Luna! Nngh… relax!"

	Why? This was what was missing, this tightness, the fullness, the warm moistness of her sister’s pre that did practically nothing to make this any quicker for her. Inch by slow inch, Luna felt herself being filled, that throbbing, warming cock something she would be sure to experience in this part of her again. A thousand years had done some strange things to sexual morals but this still had that edge of delicious naughtiness.

	And then the medial ring, squeezed past and making her whole body tense up before she relaxed despite herself and Celestia pushed the rest of the way with more force, bottoming out quickly after. White hands circled her buttocks, rubbing around to meet her cutie marks and massaging those sensitive points. Luna couldn’t help but squirm on the member inside her, pushing back until Celestia relented and slowly pulled herself out.

	Her quiet whimpers went unnoticed as Celestia thrust back in, pulling Luna’s hips back to meet her own. The fingers down between her legs were rubbing at her labia now, thumb back to its work on her clit, running in circles that moved ever closer and quicker. Even now she was close, so desperately close.

	Above her, Celestia grunted roughly, digging her fingers into her sister’s behind and putting all the strength she could into pulling on those hips. With each thrust Luna provided less resistance, each pass that bit easier until she was beating out a rhythm.

	"Hngh!" Luna rubbed her head from side to side on the pillow, eyes tightly shut before she turned back. "S-Sister, please! Just a… a l-little more!"

	She could feel it, feel that pleasure rising to a point far faster than it had before. Her fingers delved into herself, her thumb sliding over and back on her clit, the mare too far gone to care for all save the spasms of pleasure that rocked her body against Celestia’s. Just a few more thrusts, a few more strokes of that glorious cock and she’d be there, just…

	The thought dissolved as it finally happened. Luna’s hand fell to the bed and her teeth pulled on the pillow, ripping a piece of the fabric free as she struggled to keep herself from doing more than shaking and bucking her hips back against Celestia. Fluids dribbled down her thighs and her tail twitched wildly, her rump clenching down enough on the cock pistoning on her almost enough to halt it.

	Somewhere behind her, Celestia grunted and pulled Luna’s pelvis back into her, her thrusts becoming uneven and shallow.

	"Luna… Luna, I-I-"

	A hand searching about that finally met her own stopped her mid-sentence and she knew. A few more thrusts, her breathing laboured and heavy and she collapsed over her sister’s back.

	Pleasure swelled up in Luna at the sensation of her Celestia’s thickening member and then the hot, wet feeling of her semen spattering inside her in thick streams. Her knees fell back, Celestia simply falling with her, holding tight to her hips and still bucking with each throb of her cock. Cum welled up inside her, pressing down against the fat organ but finding no escape; it only pushed Celestia further.

	She had not imagined that the spell could produce such virility and through the haze of pleasure, Luna wondered if there was some way of further enhancing that. This feeling was what she had longed for and as the flow of semen started to subside she kept her hand tightly clasped about her sister's.

	Exhausted, sweaty and a little sore in parts, both sisters lay together until their orgasms subsided and they could separate. As she had always done before, Luna lifted Celestia’s arm over her side and shuffled back until she was lying in the curve of her body.

	Smiling, Celestia brought her arm over her sister’s chest and held her close. Later they would trade their words of love but now, now they could simply enjoy the bliss of their hard work.