Endurance

by MarieJustLeft

Rating: mature
Tags: My Little Pony: Friendship is Magic, Comedy, Starlight Glimmer, Porn, Trixie, Sex, Spike
Length: 4630

After Spike brags about how long he can last, Starlight and Trixie make a wager to see who can make him cum the quickest.

After Spike brags about how long he can last, Starlight and Trixie make a wager to see who can make him cum the quickest.

Written as an entry for the No Nut November Clopfic Contest!

CW: M/F Oral, M/F Anal, Male Masturbation, Permanent Denial!

Cover Art by Idler_R

Published 2024-11-06 17:00:00 UTC
Last updated 2024-11-06 17:00:00 UTC

The Contest

Starlight Glimmer had not been glad about the assignment, the one Twilight had left her before leaving Ponyville to embark on a faraway friendship mission. The castle’s yours. Keep an eye on things.

Starlight hardly trusted herself with responsibility, big and small, and she especially could not bear to suffer as much by her lonesome. So beginning on the very first day in-office, she invited Trixie to keep her company during the day.

Spike had warned her that Twilight would not approve, though Starlight insisted she needed the support.

Halfway through the week, around noon Spike found the mares in the Map Room, lounging about by empty bags of fast food. Trixie had her legs up on the table again, though Spike was tired of scolding her about it, so he said nothing. Spike sat himself down nearby, digging into the hayburger that they had bought for him.

“I really do feel bad about everything,” Starlight said, “I mean…He’s my best friend.”

“Former best friend,” Trixie corrected.

Sunburst, Spike deduced. Starlight did not mention him as much as she used to.

“I was never sure I wanted things to get as far as they did,” Starlight said, “He keeps writing me. I never even told him what the issue was…Is that horrible? I just didn’t want him to feel bad.”

“Yeah. Not easy to tell a guy he’s a one pump chump,” Trixie said.

“Trixie, don’t be mean,” Starlight scolded, “I care about him so much, but…it just wasn’t going to work out the way he wanted. I mean, at first I thought it was kinda cute, y’know, like that it meant he liked me so much he couldn’t control himself. But everything would always end so fast, it was just driving me crazy. I couldn’t do it. I guess most guys go through it at some point, but I don’t know.”

“Really?” Spike interjected, “I’ve never had that problem.”

Starlight and Trixie exchanged a look, unimpressed.

“Oh, is that right, Spike?” Trixie asked, dryly, “Spike the stud, huh? You’ve sure fooled us.”

“Trixie,” Starlight snapped, “Spike, she didn’t mean that. I’m sure you’re very….capable.”

Spike turned beet red.

“Hey I’m not some shrimp, OK?” Spike stuttered.

“Please. Have you ever even been with a girl before?” Trixie laughed, “You really think you could handle all of this?” Trixie glanced down at herself. Without delay, Spike felt his dick twitch as he followed her gaze. Trixie’s azure coat was slightly slick with sweat for the evening heat. She seemed soft and carried a lot of weight in her hips and her ass, but a firm build of muscle visible as well. Spike could hardly take his eyes off her, until Starlight cleared her throat to recapture his attention.

“Of course I could,” Spike boasted. He was mustering as much confidence as he could, though the stammer in his voice and the redness in his cheeks betrayed him. “I’ve never even finished first, in fact. I could last for hours if I wanted to. I’m the master of self-control, like you’ve never seen.”

“Really?” Trixie snorted, before her mouth curled up into a smirk, “Alright then, stud. Why don’t you put your money where your mouth is? I bet two hundred bits I can make you cum in less than two minutes.”

Starlight planted her hoof in her face, while Spike felt his heart begin to race.

“Uh, ah, uh,” Spike stammered.

“What’s the matter? You were talking a big game just a second ago,” Trixie laughed, glancing at Starlight, who seemed more embarrassed than amused.

“No, uh….” Spike took a deep breath, and glanced back up at her, “You’re on. I…uh…just need to go get some protection!”

Trixie raised an eyebrow.

“Don’t take too long, or I’ll get bored,” Trixie said, shooing Spike away. He scurried off, dashing around the corner and up a staircase towards his room.

“Don’t look at me like that. I’m not easy. I’m just not one to skip out on a quick two hundred bits,” Trixie said at Starlight.

“I believe you. I just don’t want either of you guys to get embarrassed,” Starlight said.

Trixie narrowed her eyes.

“What?”

“What?” Starlight said.

“Either of us? You think there’s a chance he beats me?” Trixie said.

“I didn’t say that, it’s just….Two minutes is pretty fast,” Starlight said.

“Nopony can resist the Great and Powerful Trixie. This will be simple,” Trixie said, “You think you could do better?”

“Trixie,” Starlight sighed.

“You do! I knew it!” Trixie barked.

“You’re not gonna bait me into-”

“OK. New bet. Whichever one of us makes him cum the fastest gets another two hundred,” Trixie grinned.

“No way, Trixie, I’m not-”

“I knew you’d be scared. We all know Spike thinks I’m hotter,” Trixie smiled to herself.

Starlight’s face fell flat, and she bit her tongue, frustrated with herself for succumbing to Trixie’s provocation.

“OK. You’re on,” Starlight said, smirking. Trixie laughed, triumphant.

“Four hundred bits in one day. Somepony pinch me,” Trixie grinned.

Spike returned back around the corridor out of breath, holding his knees, exhausted from the climb down the stairs. Trixie shook her head, confused. Spike had nothing in his hands.

“Um, what gives?” Trixie asked.

“I, uh, I guess I’m out of condoms. Sorry,” Spike said, rubbing the back of his head.

Trixie groaned.

“Fine. OK. Who first?” Trixie asked.

“Huh?” Spike asked.

“I’m in too, Spike,” Starlight said, stepping forward beside Trixie.

“You….You….Y-” Spike stammered.

“Well?” Trixie asked.

Spike could not manage to reply, though given he could hardly take his eyes off of Starlight, his answer was made plain.

Starlight smirked and trotted towards Spike, sitting him down on Twilight’s own seat at the Friendship Map.

Spike felt himself go weightless as he sat himself down, and Starlight fell to her knees in front of him. He could already feel her hot breath on his skin, as his cock began springing to life. His cock was small, given his size, though its spiky adornments and flared head were intimidating enough to retain Starlight’s attention. Her eyes were so pretty, he thought, and her mane, and her smile, and how gentle she was as she bent her head closer towards his cock. Spike gripped the armrests of the chair as if he was going to sink into the seat, and he felt his entire body tense up the moment her lips first brushed against his reptilian shaft.

And at that exact moment, Trixie clicked a stopwatch she had conjured, holding it mid-dair in an aura of magic, tapping her hoof impatiently.

Starlight seemed to sense how tense he was, and so she began only with soft kisses at the base of his cock, huffing in the leathery, sweaty stink of dragon. The tip of her horn teased his head while she licked at his balls, lapping up beads of sweat like a dog. She kissed her way up his shaft, sticking her tongue underneath the edges of his flares and around his spikes, which were sharper than she anticipated. When she finally reached the head, she took a step back, glancing up at him and smirking as Spike’s entire body began trembling.

She kissed the head of his cock, and then pushed her lips further on around the flared head, where the tips of the spikes pricked her gums. She used her tongue to swirl around the head still in her mouth, drenching his cock in spit. She could then begin sliding down more easily, and the length was so small she was easily able to reach the base. She returned up to the head slower, but then came down faster, and back up faster, and up and down until she could maintain a steady rhythm strong enough to send Spike into a strange kind of daze. He felt it everywhere in his cock at once, but at the same time, the momentum and the rhythm seemed to be building up a pressure in his brain and his chest and his cock.

“F-fuck….St-Starlight…” Spike murmured. As Starlight bobbed up and down, her tongue bent and buckled from left to right, keeping the shaft slick and slippery. Spike was rock hard and standing at attention, and Starlight could feel his cock throbbing right there in his mouth, shaking and begging for release.

“Thirty seconds,” Trixie warned. Starlight was too focused to notice the anxious look on Trixie’s face. As much as Trixie was eager to earn some bits, she had not exactly anticipated the consequences of losing.

Starlight ramped up the speed and used her hoof to tug on Spike’s balls, squeezing and prodding while she slid up and down with expert precision. She could feel his balls tense in her hooves, and she could taste his precum on her tongue, salty and sticky and thin. Starlight moaned in her highest little voice to try and elicit even more of a reaction, and it seemed to be working, as Spike tilted his head back and grunted. His dick kept twitching and trembling and dripping enough precum to spill out of Starlight’s mouth, and she could feel the explosion building and building and…..The alarm ran from behind them, and Starlight opened her eyes, horrified.

With a wet slap, Starlight drew herself away from Spike’s cock, wiping her mouth of spit, precum, and trace amounts of blood from his spikes. She fell back on her knees, defeated.

“Just as I thought,” chirped Trixie, while Spike panted like a dog in 90 degree weather.

Starlight gritted her teeth, frustrated with her failure, and found her way to her hooves, making way for Trixie to sub in.

In the name of fairness, Trixie gave Spike a few minutes to settle down, to avoid any substantive boost from Starlight’s own efforts. Trixie glanced over her shoulder at Starlight, who had sat herself down, exhausted.

“Let the Great and Powerful Trixie show you how it’s done,” Trixie smirked.

Starlight sighed and raised up the stopwatch, as Trixie climbed on top of Spike in the chair, sticking her hooves over his shoulders. Before Spike could prepare himself, Trixie tilted her head and dove in to plant her lips on his, so aggressively that she nearly knocked him out of his chair. Spike reciprocated by awkwardly reaching around her back to claw at her big blue ass, pinching and pulling her closer towards him.

“You like my ass, right?” Trixie whispered, “...Then have it. It’s yours.”

Trixie pulled herself off of him and spun around, crouching down and backing up so that her ass was in dangerous proximity to Spike’s face. With a voracious grin, Trixie clapped her ass for Spike’s amusement, and without further prompting Spike leapt to his feet to grab her forcefully, as if he was claiming his prize. He could smell her entire day. The hot, salty stink of sweat coaxed him closer like a moth to a flame.

“Go on,” Trixie encouraged. She was beginning to feel bad for him, almost. He’s clueless.

Spike pried her ass cheeks apart to locate her hole, and slapped his cock inside. He teased her asshole with the tip of his ready, ribbed cock, pressing his head into her entrance. Trixie shuddered as Starlight’s cold spit functioned as a lubricant, helping Spike’s cock to slip inside centimeter by centimeter. Trixie had to begin rocking her hips back to add some momentum to the equation, as Spike struggled with knowing what to do or how to move or what to say. Trixie could not say she was impressed by his length, or his positioning, or his ability to take control, though none of that mattered to her. The bits were what mattered. She had to earn this.

Trixie groaned and slammed her ass down on Spike’s cock. Spike could not take his eyes off the rippling in Trixie’s bubble butt, as his dick stretched the walls of her asshole. His spikes pricked at her from inside, as she tightened her ass and pressed with all her weight against him. Spike’s eyes rolled up, and his entire body shuddered, and he began grunting and groaning as he held all of Trixie’s weight against him. She ground her ass against him while he was hilted within her, and she could feel Spike’s cock twitch and throb and tear up her asshole. Those bits are MINE. Trixie rocked back and forth as though she were running a 5K, with such intensity that she too was gasping for breath and moaning aloud. Spike’s breath began to quicken, and his balls began to tense, and Trixie could not stop herself from grinning, as Spike’s cock kept on plumbing her ass. She felt his dick harden, and the pressure of the orgasm building, and all at once she knew she was about to feel the first ropes of cum flood her guts.

“Time,” came Starlight, yawning from a few chairs over as the stopwatch began beeping.

Trixie’s jaw dropped in horror and confusion. Spike pulled himself out, collapsing back on the chair in a sweaty heap. Trixie, meanwhile, crashed to her knees, overcome by her defeat.

“Well, Trixie. I guess you owe Spike here an apology,” Starlight said, “He really can last.”

Trixie struggled up to her hooves and turned to Spike, eyeing him, suspiciously. But before she could accuse him of anything, she sighed and conjured her purse, digging for bits. Starlight, likewise, did the same, and before Spike could even catch his breath he was drowning in a sea of golden bits,

“Well, ladies,” Spike said, eventually, eagerly collecting his new fortune in a sack, “That was fun. Maybe next time you won’t underestimate me, huh?”

“Yeah, OK Spike,” Trixie said, glumly, “Sorry for doubting you.”

Spike smiled and skipped off with his bag of treasure, leaving the two mares behind in the Map Room.

“I can’t believe it,” Trixie said.

“Yeah, honestly, I didn’t think he had it in him,” Starlight admitted.

“No, I mean, I seriously can’t believe it. Something’s off,” Trixie said, “I mean. I cheated, and he still held off.”

“What?” Starlight said, “You cheated?”

“I cast a spell at the end,” Trixie said, “But it didn’t affect him.”

“I didn’t see you cast anything,” Starlight said, confused.

“A magician never reveals her secrets, Starlight!” Trixie reminded.

“You say that three times a day,” Starlight laughed, “I can’t believe you though!”

“Yeah, sorry, I guess I got a little too greedy. It didn’t work, anyway, but see that’s what’s so weird. There’s no way he could’ve stopped himself,” Trixie said.

“Maybe you did the spell wrong,” Starlight said, teasingly.

“Certainly not!” Trixie insisted, “Something’s amiss, Starlight. And we’re going to find out what.”

It was Starlight’s idea to inspect the castle library. Like Twilight, Starlight maintained that every mystery ought to begin with a trip to the library. What Trixie had not expected was which section exactly they were beginning in.

“Dark Arts Pertaining to Erotic Physical & Mental Manipulation,” Trixie read from the sign hanging over one of the more dimly lit sections of Twilight’s library, “Twilight has an entire section just for this?”

“Yeah, she…” Starlight said, clearing her throat, “She says it’s just for knowledge purposes.”

“Uh-huh,” Trixie rolled her eyes and followed after Starlight.

“Don’t mess with anything, or Twilight will find out. I’d rather she not know about our little wager,” Starlight said.

“Why not? A freak like her would be glad to know her pet has the stamina of a marathon runner,” Trixie laughed.

Starlight shot her a disapproving look and continued down the corridor, perusing the various books and archaic tomes that sat upon the dusty shelves.

“Look here,” Starlight said, halfway down the row, “This book’s a bit out of place…”

Starlight retrieved the book, an ancient manuscript engraved with lewd depictions of ponies engaging in preposterous acts of intimacy. Starlight and Trixie both blushed at the sight of it.

Setting the book down on a nearby table, Starlight’s horn began to glow to serve as a reading light. Trixie cracked open the cover, for them to be greeted by aged, yellowing paper.

“Hm,” Starlight muttered to himself, flipping through the pages. The manuscript detailed a variety of spells, brews, and incantations, much of which had to do with distinctly lewd business.

“Hey, look, Penile Enhancement. Somepony should show Spike that, am I right?” Trixie laughed. Starlight ignored Trixie’s attempt at a high-hoof.

“Trixie…Look, this next page is ripped out. The one right after the chapter on Ejaculation Speed starts….” Starlight noticed.

“You don’t think….” Trixie said, “That little shit! Condoms, yeah right! He ran off to enchant himself just to screw us over!”

Starlight shook her head, disappointed in Spike’s actions.

“Let’s go take a look,” Starlight decided.

“What, like go through his stuff?” Trixie asked.

“This stuff is black magic. It’s dangerous. Whatever he’s done to himself, it could have bad consequences. We have to know exactly what that page said,” Starlight said.

Trixie nodded, eager for revenge.

“No one makes a sucker out of Trixie!”

Starlight had an easy time getting Spike out of his room. All she had to do was offhandedly mention that Rarity needed some help moving some packages into her house, and they had a few hours at least all to themselves.

Though she did feel a tad bit guilty rifling through Spike’s bedroom, she reminded herself that it was Spike who broke their trust first.

Trixie seemed less interested in locating the missing page, and more so in making a mess of his room, thoughtlessly knocking things over, opening drawers, and digging through closets.

“Haha, look at all these gross magazines,” Trixie said, pointing underneath Spike’s bed, “Ew! I think there’s mold growing back here!”

“I think I found it,” Starlight said, after looking through Spike’s desk.

Trixie trotted over to inspect Starlight’s discovery. The yellow parchment was fragile and brittle, just like the other pages of the manuscript, and its contents all but confirmed that this was the page they were looking for.

“The Curse of Sisyphus,” Starlight read, “Whoever recites these words, until the next setting of the sun, shall tirelessly approach release but never obtain it.”

Starlight did not dare read aloud the curse itself, written below that ominous inscription.

“How much of a loser do you have to be to put a black magic curse on yourself just to last! And I swear, I still almost got him!” Trixie laughed.

“Wait, there’s more, at the bottom here,” Starlight said, “If he who says these words doth not say aloud RELEASE ME by the end of the day, then he will be cursed FOREVERMORE.”

“Forevermore?” Trixie said, “....That sounds like a lousy boy band name.”

“It means he’ll be permanently unable to cum…” Starlight said.

“He probably didn’t even read that far, he was in such a hurry, the horny little runt,” Trixie laughed, “Haha, he probably has no idea!”

“Yeah. So we have to tell him,” Starlight said, trotting away towards the door. But Trixie’s hoof caught her before he made it far.

“Wait,” Trixie said, “....We’ll tell him. But first he has to admit what he did and give us our bits back.”

Starlight stared at her, flatly.

“This is serious, Trixie,” Starlight said.

“Yeah, well it was him who did this to himself,” Trixie reminded, “If he can’t own up to it, why should he deserve to get around the consequences?”

Starlight hesitated.

“....I mean….I could probably come up with a spell to break the curse on my own. He wouldn’t really be screwed forever,” Starlight said.

“Right. He’d only be screwed as long as we decide,” Trixie grinned, “How about that?”

Starlight bit her lip. She hated to find herself agreeing with Trixie, though she supposed if Spike could just be honest, then there would be no need to take this any further. He’ll tell the truth. I know he will.

Spike returned late in the evening, when the sun was already almost set. He found Starlight and Trixie in the Map Room, right where he had left them.

“Hey, Spike,” Trixie grinned.

“Hey,” Spike said, nervously, “...Rarity said she didn’t get any packages. But I did catch a movie with her and Fluttershy and Applejack, so I guess it worked out…What’s going on with you two?”

“Oh, we’re just so glad to have you back, Spike,” Trixie grinned, trotting over towards him. Starlight followed along, grinning in turn, and soon the two mares were pacing around Spike like sharks around their prey.

Starlight glanced out a nearby window, in time to catch the last slivers of sunlight dwindling in the sky. This is his chance. Don’t let me down, Spike.

“So, Spike, about our little contest earlier,” Starlight said.

“Oh,” Spike laughed, nervously, “That? Ha, yeah, that was a lotta fun.”

“Yeah, it sure was,” Starlight said, “Spike….You played fairly, right?”

Spike felt his face redden.

“F-uh, I-I, uh….Y-You…Of c-course, yeah. What? Yes! Of course! Did you?” Spike stammered.

“We were just so amazed by that performance of yours, Spike, we even wanted to have another go at it,” Trixie teased, “But we just need to know….You didn’t cheat, did you? You didn’t have any help?”

Trixie’s words were as plain as an accusation could get, and Starlight relaxed.

“Nope!” Spike chimed, so innocently that Starlight could have believed him if she didn’t know better. Starlight shot a worried glance at Trixie, who only shrugged. Spike, you’re making a BIG mistake!

“You’re sure?” Starlight asked, almost sadly.

“Yeah! I told you I was good, didn’t I?” Spike laughed.

Starlight glanced back at the window, just as the last slivers of sunlight finally disappeared over the hills. And with the last light went Spike’s laughter, subsiding as a strange feeling of dread overcame him.

Trixie wasted no time in proceeding with the plan, while Starlight seemed more regretful over Spike having unwittingly resigned himself to a fate of permanent denial.

Trixie fell to her knees in front of Spike, whose cock was already semi-hard.

“You’re so right, Spike. We have to make it up to you for ever doubting you. Starlight?” Trixie cooed. Starlight sighed and trotted over, kneeling beside Trixie.

“Why don’t you start, and just watch us, OK?” Trixie said, before turning to Starlight and taking her by the hoof. Starlight knew that look, and she shut her eyes as Trixie leaned in for a kiss. Trixie could immediately register Spike’s leathery taste on Starlight’s lips, as the two wrestled tongues with one another for dominance of the other. Trixie caught a tuft of Starlight’s mane with her hoof, while Starlight reached down low to paw at Trixie’s ass and flick Trixie’s clit.

Watching the two mares was Spike, with two hands on his cock, pumping away without any restraint. That curse he cast earlier had taken a toll on him, physically and mentally, and although he had made out with all the bits, what he really needed was a proper orgasm. He thundered away at his throbbing cock with both claws, struggling to pick which mare he planned on dousing with his incoming load.

Starlight and Trixie were still making love to each other, as both of their hooves found each others’ pussies, digging and swirling and pressing deep. They knew every right button to punch, and held nothing back as they put on their show for Spike, who was still furiously fucking his fists.

After only about two minutes, Spike could feel his balls clench and his dick harden in his grasp.

“Which one of you wants it?” Spike asked, grinning.

“Me! Oh please, me, Spike, me!” Trixie cried.

“No, don’t listen to her, Do me!” Starlight insisted.

“SPIKE! I WANT YOUR CUM SO SO BAD!” Trixie screamed.

“PLEASE SPIKE!! CUM ON ME! CUM ON MY FACE!” Starlight begged, sticking her tongue out. Trixie followed suit, all while struggling to hold in her laughter.

Spike sped up his stroking, and he could feel the pressure building and building. The sun’s set, the curse is done. Everything went just as planned. He held off from looking too smug about it, for fear of the girls noticing. You’re always one step ahead, Spike.

“Get ready, I’m about to - c-aha-aha-....wha-ah….hahhh….huh?” Spike grunted. He pumped and pumped, but he could not get past the edge. He tried again, faster this time, but the pressure lingered at just the worst spot imaginable, right before he could teeter off down the other side of the slope. Just the slightest push would set him there, but for all his efforts, he remained where he was, grounded at the tip, at the edge, helplessly. Come ON! I NEED THIS! Spike grunted and winced and groaned and was close to shredding the skin off his dick for how rigorous his strokes were, all to no avail. FUCK!!! Something was wrong. Was he not aroused enough? No, that couldn’t be it, he was practically drooling at the sight of Starlight and Trixie with their legs around each other. Am I nervous? Why should he be? He had just today proven to them what a stud he could be! No, something was wrong. Really wrong. It felt just as it had earlier, when the curse….the curse…..

“The curse!” Spike said aloud, horrified.

Trixie burst into laughter, and even Starlight cracked a grin, as they both stood up and backed away from Spike and his raging erection.

“HAHA we got you so good,” Trixie laughed.

“Sorry, Spike,” Starlight said, “We did give you a chance.”

“What….How?? It’s sunset!” Spike exclaimed.

Starlight tossed him the torn-out page that she had crumpled up and kept in her purse nearby. Spike read it all the way through this time, and when he came upon the bottom transcription, he turned a ghastly shade of white.

“P….P….Permanent?” Spike stammered. He felt like throwing up, or passing out, or both at once.

“I can help you, Spike,” Starlight said, “I can come up with a spell to break the curse. I’ve seen these types before, it won’t take much.”

Spike threw himself down at her hooves, forgoing his front of confidence, forgoing even what dignity had yet remained to him.

“Oh thank you, Starlight, thank you thank you I’m so so sorry!” Spike wailed.

“...I said I could. Not that I will,” Starlight said, glancing at Trixie.

“W-What?” Spike said, horrified, “I can’t stay like this forever!”

“You won’t. I’ll free you eventually. When that is, will be up to us,” Starlight said.

Spike’s shoulders fell slack, as the weight of predicament fell upon him.

“Please, I’ll do anything!” Spike said.

“You can start by giving us our bits back,” Trixie said, “With interest. Let’s say, an extra hundred each.”

“...OK, OK, it’s yours,” Spike said, “And then you’ll free me?”

“Not so fast,” Starlight said, “You want to cum again? Then you’re gonna have to earn it. You’re gonna have to prove that you really can endure, Spike.”

Spike felt his heart sink in his chest.

“We’re gonna have so much fun with you,” Trixie grinned, “You’re going to need to give us each a hundred orgasms before we even think about letting you have one.”

“Oh, Celestia,” Spike said, holding his head in his hands.

“Don’t look so scared, Spike,” Starlight said, gently, “This is your real chance to prove to us that you can take the heat. Make it through what we’re planning and you’ll have nothing left to prove.”

“Yeah,” Trixie said, eager to get started. Spike sighed, and supposed he had no choice. He glanced up at the two mares, who exchanged another look, ecstatic to play with their new toy.

“So,” came Starlight, “Which one of us do you want first?”