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The Butt Within

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Logan is married, he loves his wife and they get along insanely well, but the sex life is missing something. They have good, even great sex. One day while showering something slippery crawls inside Logan’s butt. It’s gives him immense pleasure, more than the butt plugs or dildos from before. He realizes without a doubt he wants to be anal only

Chapter 1: The Shower Invasion

The apartment was quiet, the kind of quiet that usually felt like comfort but tonight just felt like silence. Logan towel-dried his hair, listening to the distant hum of the dishwasher and the murmur of the TV from the living room where Sarah was watching some baking competition.

“You heading to bed?” she called out.

“Yeah, long day. Just gonna rinse off first.”

“Okay, honey. Love you.”

“Love you too,” he said, and he meant it. He really did.

He closed the bathroom door, the click of the latch louder than usual. The mirror was already fogging at the edges from the steam of Sarah’s shower earlier. He caught his own reflection—the flecks of grey at his temples, the lines around his eyes from smiling. A normal, happy, thirty-eight-year-old man. He turned away and cranked the shower handle.

Hot water hit his chest, plastering the dark hair to his skin. He let out a long breath, tilting his head back under the spray. This was the routine. Wash away the code, the meetings, the comfortable predictability of his life. He soaped his arms, his chest, the mundane ritual of it all.

But his mind wasn’t on the code today. It was circling something else, a dark, sticky desire he could never quite scrub clean. He loved Sarah. Their sex life was good, affectionate, warm. But lately, it was like hearing a familiar song played slightly out of tune. He found himself fantasizing about a deeper, sharper, more consuming kind of feeling. A shameful, specific ache centered on a part of his body he wasn't supposed to think about that way. He’d browse certain sites late at night, his heart hammering, consumed by images and ideas that left him flushed with equal parts arousal and self-loathing.

He braced his hands against the cool tile, water sluicing down the groove of his spine. He imagined… pressure. Not Sarah’s gentle touch. Something else. Something insistent and unforgiving. His breath hitched. It was just a fantasy. A secret he’d never act on.

He reached for the body wash, fumbling the bottle. It clattered into the corner of the shower stall, near the drain. He bent to retrieve it, the water beating down on his back.

That’s when he felt it.

A shift in the water at his feet. Not the usual pull toward the drain. Something else, a viscous ripple against his ankle. He glanced down. Nothing. Just the rusty stain around the metal drain cover. The grout was black and crumbling, a damp trench between the tiles.

Must be the heat. The steam. He was lightheaded.

He stood back up, squeezing citrus-scented gel into his palm. He was just lathering it over his shoulders when the water pressure dropped for a second, the sprayhead emitting a low, guttural hum. The drain gulped.

Then, a touch.

It was a firm, slick pressure, right at the cleft of his ass. Not a trickle of water. A deliberate, probing presence.

He froze. “What the…”

It pushed. Not hard, but insistently. A thick, warm slickness that wasn’t soap, wasn’t water. It felt alive. It coiled, just for a second, a teasing promise of intrusion.

Logan gasped, his whole body tensing. He tried to straighten, to turn, but his muscles locked. Shock held him pinned against the tile. This wasn’t happening. This couldn’t be.

It pushed again. This time, it didn’t stop.

There was a burning stretch, unbelievable and electric, as the slick, sinuous thing breached him. It wasn’t blunt. It was tapered, purposeful, sliding in with a wet, easy glide that spoke of a terrifying intelligence. It filled him, deeper than he’d ever imagined possible, coiling and pressing against some profound, hidden core.

A ragged cry tore from his throat, lost in the shower’s spray. His legs shook violently. He scrabbled at the tile, fingers slipping. Pleasure, raw and devastating, erupted from the point of invasion, a lightning bolt that shot up his spine and short-circuited his brain. It was everything he’d secretly craved—the intensity, the shameful fullness, the complete violation of his control—but real, so fucking real it blurred the line between ecstasy and terror.

It moved inside him. A slow, undulating pulse. In… and out. A perfect, filthy rhythm.

“Oh, god… oh fuck…” he choked out, his forehead pressed to the wall. His cock was achingly hard, bobbing uselessly under the stream. He was being fucked by something he couldn’t see, something that had oozed from the fucking drain, and his body was arching back into it, begging for more.

He came without a touch, a violent, silent convulsion that left white streaks on the shower wall, his vision spotting. The thing inside him didn’t stop. It kept moving, milking the last shocks of sensation from him, until the pleasure tipped over into a pain so sharp it was almost sweet.

Then, as suddenly as it began, it withdrew. A slow, slick slide out of him, leaving him feeling hollowed out and gaping.

The water pressure normalized. The gurgle in the drain subsided to a faint trickle.

Logan slumped, his body sliding down the wall until he was huddled on the shower floor, knees to his chest. The hot water beat down on his head. He was trembling, crying silently. He could feel a strange, cool slickness leaking from him, mixing with the shower run-off.

From the other room, he heard Sarah’s laugh at something on TV. A normal sound. A world away.

He looked at the drain. Just a drain. He looked at his hands, which were shaking. The evidence of his climax was already washing away.

What the hell just happened? Did he… imagine that? A psychotic break brought on by repressed desire? But the phantom fullness, the specific, aching tenderness felt too real. Too physical.

He forced himself to stand on unsteady legs, turned off the water. The silence was deafening. He wrapped a towel around his waist, avoiding his own eyes in the misty mirror.

He had wanted intensity. He had craved a sensation that would shatter his comfortable world.

As he opened the bathroom door, the warm, vanilla-scented air of his home meeting the chill on his skin, one terrible, thrilling thought echoed in the hollow quiet of his mind.

He might have gotten it.

He might have gotten it.

The thought was a cold stone in his gut as he stood in their bedroom, pulling on a pair of soft sweatpants. Sarah was already in bed, reading on her tablet. She smiled at him over the top of it. “All squeaky clean?”

“Yeah,” he said, the word catching in his throat. He felt anything but clean. He felt altered. Occupied.

There was a… warmth. A low, humming presence deep inside him that wasn’t his own. It wasn’t moving, but it was there, a curled, patient weight against his core. And his body, that treacherous, shameful part of it, felt profoundly different. Open. Sensitive in a way that made the brush of fabric an almost unbearable tease. It felt pristine, empty yet ready, as if it had been meticulously scoured and prepared.

“You okay?” Sarah asked, her smile fading into a look of concern. “You’re kind of pale.”

“Long day,” he repeated, the lie now a brittle shell. “Mind’s just racing. I think I need some air. Maybe a quick walk to clear my head.”

“At ten-thirty?”

“Just around the block. I won’t be long.”

He kissed her forehead, tasting her moisturizer, and the normalcy of it almost broke him. He grabbed a hoodie and was out the front door before she could say another word.

The night air was cool. It didn’t help. The warmth inside him pulsed gently, a silent, biological clock ticking toward something. His footsteps on the pavement weren’t taking him around the block. They were carrying him downtown, toward the seedy strip lit by neon where the adult bookstore sat between a pawn shop and a closed-up diner.

‘The Velvet Box.’ The sign flickered. His heart hammered against his ribs. He’d never been inside a place like this. He pushed the door open, a buzzer announcing his shame to the bored-looking clerk behind a fortified plexiglass window.

The air smelled of cheap plastic and artificial cherries. Racks of DVDs, leather harnesses, neon novelties. He moved past it all, head down, to the wall of toys. His eyes scanned the shapes, the sizes. His insides clenched, that inner warmth seeming to stir with interest. He reached out, his hand trembling, and took a box from the shelf. It was modest, really. A smooth, silicone shaft, thicker than he’d ever considered. The packaging promised ‘realistic feel.’

He paid in cash, avoiding the clerk’s eyes, shoving the box deep into his hoodie pocket. The weight of it burned against his thigh.

He wasn’t going to make it home. The need was a physical scream, a throbbing, empty ache that the thing inside him seemed to be amplifying. He turned, walking fast, his breath coming in short pants. Two blocks over was Riverside Park, mostly deserted at this hour, known more for its shadowy benches than its scenic views.

He found a spot behind a dense thicket of oleander, the sound of the freeway a distant roar. His hands were shaking so badly he could barely rip the plastic clamshell open. He discarded the packaging, the slick silicone cool in his grip.

This was insane. He was in a public park. He was a married man. He was a senior developer at a tech firm. Logan panted, leaning one hand against the rough bark of a tree. The other hand guided the tip of the toy to him, over the soft fabric of his sweatpants.

Even that pressure, indirect and muted, made his knees buckle. A choked sound escaped him. He fumbled with his drawstring, yanked the waistband down just enough.

He pressed the blunt, cool head against his entrance.

There was no resistance. None. His body, remade, simply opened for it. A silken, effortless glide that stole the air from his lungs. It wasn’t just loose. It was welcoming. Voracious. It was wet, too—a natural, slick heat that bloomed from inside him, coating the invading shaft with shocking ease.

“Oh, Christ,” he whimpered into the night.

He pushed it deeper. The stretch was immense, exquisite, filling that desperate, crafted void perfectly. It felt impossibly good. A raw, filthy completeness that his hand, his wife, his imagination had never even approached. He didn’t have to fuck himself with it. His body seemed to do the work, internal muscles he’d never consciously controlled rippling and milking the length, pulling it in deeper.

He set a brutal pace, pounding the toy into the flawless, slick channel his ass had become. The tree bark scraped his forehead. Each thrust was a lightning strike of pleasure, pure and undiluted. He wasn’t thinking about Sarah, or the alien, or his job. He was just an animal chasing a feeling, slamming himself onto plastic because it was the only thing that matched the hunger he’d been given.

He came again, violently, untouched, his release splattering the dirt and leaves at his feet. He kept going. The sensations didn’t diminish. They intensified, a feedback loop of penetration and bliss. He came a second time, a dry, aching convulsion that left him seeing stars.

Finally, he slumped, the toy still buried inside him. He pulled it out. It slipped free with a wet, shameful sound. He looked at it, gleaming under the distant streetlight. Clean. Pristine. Not a trace of anything on it. He was clean. He felt… empty, but ready. The warm, living presence inside him settled, satiated, humming with approval.

He shoved the toy back in the box, then into his pocket. He pulled up his pants. There was no mess. No discomfort. Just a profound, echoing satisfaction, and beneath it, a terror so deep it felt like ice in his veins.

He walked home. The ordinary streets seemed like a movie set. He let himself in, toes of his sneakers quiet on the hardwood.

Sarah was asleep, her tablet dark on her chest.

He went into the bathroom, locked the door, and looked in the mirror. Same face. Same grey flecks. He pulled down his sweatpants and looked over his shoulder at his reflection. Nothing looked different. It was just him.

But it wasn’t. He was a host. He was a perfect, self-cleaning socket. He was hungry, and he now knew exactly what he needed to feed it.

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