"Hey! Get your flank off the floor—I need to clean it."

Horizon jumped at the sudden, harsh voice ringing in his ears. He groaned as it bounced around his head, and let out a sharp yelp as something whipped past the edge of his ear.

The bartender glared down at him, a broom hovering at his side. "Get up, I said. And put your shit away—nobody needs to see that."

Horizon felt a strange weight on his flank and his eyes drifted down past his chest and stomach. He let out another muffled yelp as he noticed his swollen, soccerball sized testicles resting in between his legs, displaying themselves for the world to see. His cheeks instantly flushed a deeper red than any he'd seen before, and magic buzzed on the edge of his horn as he did his best to reactive that illusion spell that covered them.

Once. Twice. Finally, on the third try, and panting heavily, Horizon watched the spell pass over his oversized nuts, concealing them from view. The bartender gave a grunt of affirmation and prodded him with the edge of his broom again.

"Well? Get moving. I don't have all day—I've gotta have this shack ready again by tonight, especially after all the damage you louts did."

Horizon didn't waste any time in quickly bobbing his head and galloping out of the building. The door was—thankfully—open. A shrill ringing sound still seemed to echo between his ears, and his engorged balls—though invisible to the eye—smacked against the sides of his flanks as he ran.

It was a nice day outside, which was a welcome surprise given the fact that they'd been expecting the temperatures to drop off shortly after harvest time. He probably would have appreciated it more had a miniature pony not currently been working inside of his head, smashing against his eardrums with a hammer with each step he took. Finally, he came to a stop, groaning quietly and hanging his head.

"Hey! You!"

He blinked and swallowed, trying to moisten his too-dry throat as he turned to the side. A mare was trotting up to him, a little smile on her face. Her mane, a bright green color, bounced around her neck.

"Remember me?" she asked with a grin. He nearly shook his head but then paused. She looked familiar...

His eyes widened. Yup; she was the same farmpony who'd toasted him last night in the bar. Instantly, his cheeks colored an even deeper red than before, and she let out a loud, throaty laugh.

"Guess you're just coming out of the cider now, huh?" she asked. He grunted quietly and inclined his head, not wanting to hurt his head any more. "Where's your house?"

He made a vague gesture off back toward the farm. She quirked an eyebrow.

"Is it far?"

He gave a halfhearted shrug.

With a snort, she took him by the hoof. "Come on, then," she said. "I'll take you to my place to get you washed up. I'm in town. Nopony deserves to go all that way on a hangover that bad."

Horizon let out a sigh as the water splashed against his face. "Ugh..."

"Better?" The mare looked at him from the doorway of her bathroom.

He nodded. "Definitely." The cool tap water felt refreshing as it ran down his face, and he could already feel the vestiges of his hangover disappearing. The pain reliever and crackers she'd given him had helped too; before, his stomach had felt ready to burst, but now he felt much more clearheaded.

Clearheaded enough to remember—

Aw, crap.

"So you work on the farm, right?" The mare trotted up to him, a towel slung over her shoulder. She held it out to him, and he took it gladly, his magic picking it up and rubbing it across his face to absorb the leftover moisture.

"Yeah," he said. "You look familiar, too. You're—"

"—an agricultural technician." At his slightly bewildered expression, she grinned, shrugging. "Farm scientist, basically. I make sure that everything goes smoothly when planning out which crops to put where, and which can get the best nutrients."

"Oh." He swallowed, dabbing against his forehead as the last vestiges of his hangover trickled away. "Right. I knew I'd seen you around, especially before planting season."

"And I know who you are," she said, her eyebrows rising up into her forehead. "Horizon the Farmpony, the stallion whose special spell has made him the talk of every produce marketer in Fillydelphia."

He chuckled. "You did seem to notice that last night."

An odd look seemed to cross her face. "I did?"

"Yup."

"Huh." She put a hoof to her chin, and slowly, a strange gleam seemed to appear in her eyes. "That's not all I noticed, though."

His eyes flashed down to the floor before hers did, but when he looked back up, there was laughter in her eyes, as well as something else. He licked his lips.

"Uh—yeah. Right." He chuckled, the blush on his face stretching across his full snout. "I guess I was pretty drunk, huh?"

"You definitely were." There was a faraway quality to her voice, as though she wasn't quite listening. Suddenly, she asked, "Tell me—does it hurt?"

He blinked. "Huh?"

"Your, uh, thing." She made a vague sort of gesture toward his back legs, and the heat on his cheeks increased in intensity. "Y'know; when it comes out. All that blood flow."

"Oh! I mean—no; not really." He bit his lips, his eyes flickering from side to side. Anywhere but into her face. "It just feels...really good, actually."

"Sorry," she said quickly. "I didn't mean to make you feel uncomfortable."

"No, no." He shook his head quickly. "I don't want to be rude—you did let me into your house to clean up, after all. It's just a bit...awkward."

"Of course. Maybe we should go to another topic?"

Before he could reply, the mare took a step toward him and took the towel in her own hoof. "You missed a spot," she murmured, and dabbed at a place just beneath his ear.

"So," she went on, "How about that bet, huh?"

He almost groaned, caught himself, and then groaned anyway. "Dammit. That. I've gone and screwed myself over with that one."

"Really?"

"Yup." He closed his eyes. "Blaze is never gonna let it go. There's no way I'll be able to—uh—do that enough times to fulfill it. I probably shouldn't have drunk so much last night."

"Oh, I wouldn't be so sure."

He blinked. "Huh?"

There was a sly sort of smile on the mare's face as she leaned in closer to him until her lips were just barely approaching his ear. "I think you'll have an easier time than you think," she murmured.

A shiver ran down his spine.

She pulled back, the towel coming with her before she dropped it onto the bathroom counter. "Tell you what," she said, that odd gleam in her eyes again. "What with me letting you in here to get rid of that hangover, how about you do me a little favor?"

"What?" His reply came almost a bit too quickly, and Horizon gulped as the look in her eye intensified.

"Well," she said, almost in a singsong voice. "You must know that I'm a biologist of sorts—I study life of all kinds, not just plants. So maybe it would do me and my studies some good to take a look at your little friend down there"—she winked—"and do a bit of...observation." She cleared her throat. "For science, of course."

"Uh," Horizon stammered. "F-for science?" His cheeks felt like they were on fire.

She pursed her lips and nodded. "For science," she echoed.

"Well," Horizon said, swallowing again and trying to keep his voice steady. "If you're—well, if you're really sure, then I can't see the harm in it, I guess."

A wide grin spread across the mare's face, and she clapped her hooves together. "Excellent. I'll show you to the bedroom so that we can get you in the proper scientific posture—it's right this way."

Before she could lead him all the way out, though, he stopped in place, a frown on his face. "What's your name, anyway?"

"Chestnut," she said, and pulled him through the doorway.

Her bedroom was fairly unassuming, which Horizon could have guessed from that fact that she appeared to live alone. A few ribbons dotted the walls, most commonly mounted next to cutouts of newspaper articles or diplomas. When she spotted him eyeing one in particular, she let out a quick chuckle and shook her head.

"Certificate of membership for the Journal of Agricultural Sciences," she said. She nudged him toward the bed—twin sized, with an olive green blanket pulled over it. "Now let's get you set up."

Horizon didn't protest as she pushed him back onto the bed. He took a seat on the side, his legs dangling over and his forehooves keeping him upright. She frowned as she glanced over his underside; it was barer than a patch of stone. "What's going on here?"

Cautiously, she reached down to poke at his stomach—and her hoof stopped in midair, meeting some resistance. She quirked an eyebrow and moved her hoof lower; before she could make her way through his legs, it made contact with what felt like smooth, taut skin. Horizon shuddered slightly, a small feeling of pleasure running through his body at her touch.

"I—uh, use a vanishing spell to hide it when I'm out in public." He grinned sheepishly, watching the look on her face. "Here: let me take it off for you." He screwed his eyes shut and a flicker of green light appeared on the tip of his horn.

By the small "o" that her mouth made, and the way that her eyebrows climbed up into her forehead, he could tell that she was impressed.

Her accidental stroking had evidently left him feeling more than slightly stimulated; his flaccid footlong was out of its sheath and resting quietly against his stomach. His balls, made visible with the release of his spell, sat heavily between his legs, forcing them apart by about an inch. Her hoof, which had been resting on the surface of his right nut, quickly drew back, and she flushed.

"Whoops," she said, coughing off to the side. "I...wasn't expecting that." She cleared her throat. "Mind if I take a closer look?"

He shook his head mutely.

She leaned in closer, watching with what looked like rapt fascination as his stallionhood raised itself into the air. Blood pumping through engorged veins filled its thick circumference, shooting it up in the air like the raising of a flag. Like he always did upon seeing his new endowment, a small, unconscious smirk rose on his face. Other stallions talked about having their cocks at "full mast;" if anything, he had a full skyscraper sitting between his legs.

Up and up it rose, higher into the air. Chestnut's chin slowly rose up alongside it, her eyebrows looking as though they were about to shoot off of her forehead out of sheer disbelief. Horizon let out a soft moan, involuntarily running his hoof across the wide, mushroom-shaped head as it reached fifteen inches in length; it quickly surpassed that, reaching eighteen and then twenty. The width bulked up too until it was as long across as two of his hooves put together, a throbbing mass of warm, pony flesh. It felt heavy against his chest, standing straight up into the air as his balls, recognizing the familiar sensation of an erection, sloshed eagerly with their stores full of cum. He flexed his crotch, his dick poking up half an inch higher into the air as it tensed, finally reaching its full height of two whopping feet.

"Well," Chestnut said. Horizon looked down at her; she was kneeling below the bed, looking up at his towering cock.

She licked her lips. "That's…impressive. More than impressive, really."

"Heh."

"Tell me." She tilted her head to the side and ran her hoof down half of his dick's length; he shivered in pleasure. "How have you dealt with this…titan all your life? Puberty must have been hell for you, I'd imagine, especially before you could come up with that vanishing spell."

"Actually," he said, "it's only been like this for a little while. A little over a month, really."

She blinked, looking at him in confusion. He watched as understanding dawned over her eyes. "Ah." The corner of her mouth curled up into a grin. "Your spell."

"Exactly."

Chestnut shook her head, chuckling under her breath. "I've got to say, then," she murmured, "it looks like you've really hit the jackpot as far as special talents go."

Horizon felt a swell of pride—as well as a swelling somewhere else, his cock seeming to stand up even straighter under her watchful and analytical eye. As he watched, though, something else entered into her face: something that he'd gotten better at recognizing in the past month. Hunger.

"Yeah." He grinned sheepishly. "It started off as a paltry seven inches until I got the bright idea one night to make it bigger. I had no idea it'd grow this much, though."

"Fascinating," Chestnut breathed. Her warm, moist breath wrapped around the base of his package, warming his ballsack and increasing the bloodflow by a minute amount. "I can't help but wonder why the difference of effect between plant and animal biology would be so…pronounced."

Her hoof wavering in the air, she slowly leaned in closer, her lips parted. Before Horizon could react, her tongue was out, held delicately between her teeth, and dragging up the length of his cock. He moaned softly, his hips thrusting reflexively into the air.

"You liked that, hm?" She looked back up at him and smirked. "Let's try another trial." This time, her tongue was wetter, the feeling stronger as she moved her mouth up and around his tower of a deck. Her tongue lapped up against veins full of pumping blood, running across in a wave pattern as she made her way up toward his engorged mushroom head. Finally, she reached the top and placed a delicate kiss on its tip.

Again, involuntarily, Horizon's hips pulsed outward as he let out a moan of pleasure. This time, though, his hooves came off of the sides of the bed, presumably to stroke his stallion hood on their own—and he lost his balance. With a grunt, he came tumbling over the side of the bed and onto Chestnut's front, pinning her to the ground beneath his enormous dick.

"Oh, my gosh." His eyes were wide. "I'm so sorry; I—"

"Oh, my," she breathed. She squirmed beneath his weight, her soft tummy rubbing against his throbbing member. They'd landed facing opposite directions—she was facing the bed, staring up at the ceiling, while his back hooves rested on the ground on either side of her face, his horn pointed toward the door. "You—your—" She sucked in a deep breath and then let it out in a slow hiss. "Oooohhhhh…"

Horizon blinked, and then gasped. Without his noticing, his forehoof had landed in between Chestnut's flanks, spreading them wide. Its edge just barely brushed against her taint, and from the way that she was squirming against his dick, it was clear that she was enjoying it. Hesitantly, cautiously, he moved his hoof down between her cheeks until the edge of his leg was brushing against her lips.

She moaned again. "Don't stop—do it again." Not wanting to upset her, Horizon complied. His hoof rubbed up and down the edges of her labia, working its way across her folds. She moved beneath him and he moaned in return; the ripple of her muscle and skin beneath him molded almost perfectly against his giant cock, the pressure on it increasing as she thrust her hips toward his head.

Without knowing why, exactly, Horizon bent down, his mouth held slightly open. He'd never done this himself, but he'd heard of other stallions doing it to mares, and he thought he might as well give it a try. Tentatively, his tongue flickered out of his mouth and brushed against her nethers.

The effect was immediate. She opened one eye and cracked a smile toward him, though the shudder that passed through (which he guessed—or at least hoped—was pleasure) told him that he'd had the desired effect. "Keep going," she murmured, and ran a hoof down the side of his cock that was still exposed to air.

Horizon didn't even hesitate. He bent his head down and worked his tongue deeper into her, flicking the organ ever so often to one side or the other. He touched soft, moist flesh inside, his snout pressing her exposed skin down as his tongue lapped eagerly at her marehood.

He withdrew and she moaned in evident displeasure as his tongue flicked and teased against her lips. He tasted something wet against his mouth and took a slow, long lick against her labia to fully taste the warm, sweet flavor of her juices.

She let out a grunt, her hoof rubbing in small, taut circles across his cock, and he dove back in with gusto, using his tongue, lip and hooves to play, taunt, and pleasure her into cumming.

After only fifteen seconds more, she let out a sharp, muffled cry, her back arching beneath him and driving his cock even further into the soft flesh of her stomach. Cum dribbled from her marehood and onto the carpet below, moist and shining in the lamplight overhead.

"Have you been with a mare since your…change?" she breathed, her hoof tracing down the side of his flanks. He turned back toward her and, mutely, shook his head.

Without inviting argument, she pushed him off of her, his dick bobbing up and down in the cool air, and shoved him onto the bed. He landed on his back, his cock standing straight up in the air and his balls hanging down between his legs. Cum and lust churned in their depths, and he moaned as his cock seemed to throb with a steady beat.

"Well, then," she whispered, pushing him back down onto the bed and narrowing her eyes. "We should do a test run, then. Just to make sure everything is in…working order."

"For science?" he gasped, just barely managing to make out the words in his haze of lust and pleasure.

"For science." Her mouth quirked to the side in a cheeky grin, which soon vanished as a reflection of pure lust rippled into her eyes. She hopped up onto the bed, straddling his huge testicles as his dick throbbed appreciatively.

Getting onto his cock, though, was a bit more difficult than they'd expected. Quickly, though—driven by need, rather than just interest—they managed to bring the tip of his wide, mushroom head against the lips of her marehood. She let out a quiet moan as it penetrated her, just the head managing to spread her legs wider than either of them had expected.

Slowly, not wanting to hurt her—he wasn't sure of what his equipment was capable of—Horizon let Chestnut lower herself down onto his cock. His eyes flickered shut, his teeth biting his lip as her moist, wetted lips managed to slip past the entirety of the head, descending over all four inches.

"Oh," she sighed, "That feels—"

"—Good?" he grunted, barely managing to keep a hold of coherent thought.

"Incredible," she replied. She lowered herself a little further and let out a little squeak as his cock stopped in place, seven inches into her. "Amazing. Simply…prodigious."

She squirmed a bit on top, the extra stimulation of her tight lips wrapped around her head sending pulses of electricity shooting through Horizon's spine. "We can stop there," he mumbled, watching her eyelids flutter. "You don't have to take too much, if you don't think you can."

"No—no!" Her voice came out harsh; demanding, even. A sheepish smile flickered across her face as she glanced down at him, still sitting, for all intents and purposes, with her flanks spread wide across the top of his enormous stallionhood. "I can keep going. Just—just one moment."

She slowly pushed herself up so that only three inches were left inside of her; the rest slide free with a wet-sounding schlick. Her hooves rested on his giant, taut balls, the seed within swirling and screaming at her touch. Then, without warning, she let herself drop back down.

Horizon gaped as she slid down a full half of his cock, effectively impaling herself on twelve inches of his cock. "Are you sure," he grunted, "that you can take it?"

She sneered. "This is nothing."

She moved her marehood up and down the length of his cock a few times, her moist folds surrounding and teasing his fat member. He moaned in blind pleasure—the tightness was almost too much. He could almost see a small bump moving beneath her stomach, poking against the flesh of her abdomen and actually bowing out of her vaginal cavity.

She let herself drop again, and this time, managed to take a full eighteen inches.

Horizon's eyes rolled back into his head, and from her startled, aroused gasp, he imagined that she was doing the same. This was way behind intense. This pleasure was something he'd never dreamed of. Her hooves put extra pressure on his full, heavy balls as her marehood clenched tight around a foot and a half of his throbbing, blood-filled dick. Her warm, wet walls pressed against the sides, licking against his veins and skin as she slowly moved herself up and down his length.

"Oh," she moaned, her eyes rolling back. "That'll be my cervix."

His eyes widened. "Is that—is that bad?"

"Not—not at all." She grunted, her flesh pounding against his as she forced herself to take more and more of his cock. Without even realizing it, the horn on Horizon's head lit up with a cool, green light, a thin stream of magic running through his body and enhancing the electric feeling. The same aura appeared around Chestnut's lips, soon spreading to the entirety of her taint. Eighteen inches became nineteen, soon growing into twenty as the full mushroom head of his cock bulged clearly from her stomach. Soon, only the wide, two-inch band at the base of his cock was left, the rest of her body simply speared on his massive rod.

There—he felt it now, the familiar tension building inside of his massive balls. He could feel his seed churning within them, warm and heavy, waiting to be let out. Her own folds became wetter, her grunts of pleasure mixed with moans of pain as she pumped herself up and down on top of his cock. The tension became electric, filling the entirety of his body as though holding back an avalanche behind a paltry, insufficient dam. His every limb tensed, his cock pulsing and throbbing with need and pleasure as he plunged its full, enormous length into her again and again.

With a primal shout, he threw his head back as she did the same, the tension simply exploding from between his legs. His seed, having waited long enough to be freed, burst from its dam and into Chestnut's vaginal cavity. This was no mere squirt of cum—this was a flood, echoed by a similar stream of juices (though one which in no way could compare, by volume, at least) from her own orgasm.

He grunted and yelled with each thrust of his hips, his wide, churning balls pumping load after load of warm spunk into her, filling her up with his seed. Her head bent back until her hooves were spread wide in the air, a bestial moan of need and pleasure the only thing coming from her throat. Already, her stomach was expanding outward with the sheer volume of cum that he was putting out, her belly expanding with each successive throb of his member. The moment seemed to go on for hours, their hips rolling and bucking as quarts of cum flooded into her marehood, filling her up until there was no room left, and then flooding out from her lips when it became clear that his seed couldn't be contained.

Eventually, the flood of cum slowed, soon coming to a mere dribble that trickled out of her and onto the sheets. The pounding of hot, sweaty flesh slowed as well, and Chestnut collapsed onto Horizon's chest, her eyes looking straight into his as a haze of pleasure floated across them, his shrunken balls padding beneath her weight.

"That was..." she panted. Her body pressed against his, his now-limp cock sliding free of her marehood. Her eyes flickered toward his, wide and dilated. "That was..."

"Too much?" he offered, panting as well. All of the blood was rushing back to his head, the pleasure fading, but leaving behind a pleasant afterglow that seemed to fill every vein in his body.

She stared at him for a moment, as if unsure of what to say, and then burst out laughing. "No," she said, in between wheezes. "That was perfect."

He grinned up at her. He felt oddly small, with his stallionhood now deflated, his balls emptied of their hordes of cum, but the pleasant haze that filled his mind more than made up for. "It was amazing," he agreed.

Chestnut gave him a goofy grin, her eyebrows arched high into her forehead. "You used your little spell thingy on me, didn't you?" Her voice was accusatory, but playful.

"I...well." Horizon coughed, and then gave her a sheepish smile. "I might've. Just to make things easier on you."

"Well, thanks to you, I'm looser than ever." She reached down and gave her marehood's lips a little slap. "I may need a wheelchair for weeks after this, but feel free to hit me up whenever you're in the mood."

"For more research?"

He caught her eye, and she smirked back at him.

"For more research."