Alex ran through the busy streets of town on his way back home from school, avoiding the crowds as they moved about their daily lives. No one really noticed him either however or perhaps they just ignored him with his devil lock cut and bright orange dyed hair along with his black baggy pants and hoody. He sneered at a few more well dressed woman as they almost bumped into him, knocking him back until he heard a creak. He glanced back quickly in time to spot a young tanned man falling off a ladder that he’d only moments ago bumped into. He acted fast, moving to catch the man before he fell to the ground though his thin frame couldn’t hold him for long. With an umpf the two fell to the ground though the tanned man only let out a laugh as he stood and brushed himself off. “Wow, thanks there kiddo. You really saved me from a nasty fall.” he smiled, his mouth filled with straight white teeth. Before he knew it the man had lifted him up off his feet, muscle evident under his tight dress shirt. He stammered an apology but the man just waved it away with another of his winning smiles. “Don’t worry about it, how about you come into my shop and look around? I think you might find something that...interests you.” he almost purred, eying the goth almost to knowingly but Alex was bewitched by that handsome smile and soul searching green eyes and he was easily led inside. He instantly regretted it however when he glanced around the shop as the man moved to the back, dildo’s in boxes and various sex shop fare was on display along with masks of animals and famous people on the walls. He fretted awkwardly until the man returned still with that glorious smile on his lips, carrying a small bag. Alex tried to hide his blush but the man seemed not to mind, resting a hand on his shoulder with some hefty weight to it. “Here, a sampler. Probably shouldn’t be giving it to a kid your age but...this’ll be our little secret how about?” the young store owner laughed. Alex only nodded dumbly, taking the bag as it was offered before trying to take a step back. “Don’t be a stranger there kiddo...I’m sure once you sample a few of our products...you’ll be back for a second look.” the handsome man winked.

Alex was to embarrassed to look then and there, rushing home as he’d been trying to do until the strange encounter. He didn’t stop once home however, trying to get the goods to his room and away from any eyes that might get a gander of anything inside before he could get a look. Once inside his room however, he took a deep breath as he sank down against his bed while spilling the content of the bags out alongside himself. It wasn’t much on inspection, a small bottle of lube in a black bottle and a few “enchancers” which the labels on the outside promised to turn even the most timid of people into sexual beasts. He tucked the enhancement packets away, not being to concerned about anything like that. No one at school was interested in him, and he didn’t dare tell anyone he was gay after seeing a few other boys beaten up by the foot ball club in front of the school. But the lube was good, he’d been to embarrassed to buy any and the dildo he’d stolen from his sister’s stash was to big to use without any for his first time. He turned the bottle around in his fingers, reading it’s small sales pitch. “For a tight fit, there’s only Exolube.” He chuckled as he stood and started to undress, shivering as the air in the room caressed his naked and pale body. He locked the door swiftly before moving to his dresser, rummaging through his boxers before finding what he was looking for. He pulled the silver dildo from it’s hiding place wrapped up in a bundle of socks, looking over it slowly as his body shivered once more. He glanced at the door as he moved back to his bed one last time, laying out on his stomach as he took a few deep breathes. He’d used his finger a few times in the shower, trying to open and stretch himself but he hadn’t dared use the toy after his first attempt without lube but now he was ready. He shakely reached out for the small sample bottle, cracking it open as a thick latex rubbery smell spilled forth into the room. It was musky and heavy, even just out of the bottle and it made his head swim a little giddily. He upended the bottle into his hand though cursed when the whole thing slipped out in a large pool of black liquid, trying to catch the black pool as best he could though some still dribbled onto the bedsheets. He cursed, rushing to the bathroom and into the tub before any more spilled, oggling at the almost quick silver like liquid that rested in his hands. The fluid was glossy and slick to the touch and as black as motor oil, the scent from opening the body flooding the room more until he could practically taste it. There was no way he wasn’t going to waste some at this point he reasoned, finally reaching back to spread the goop between his cheeks and his tight pucker though arched at the cold liquid with a surprised gasp. With each pass the lube seemed to heat up, even seeming to leak into him with his gentle passes over his asshole. Once he was suitabely lube up he started to press a finger into himself, arching as it slipped in easily and without resistance. He clenched around his finger, his head swimming more from the odd scent in the room and the pleasure that quickly flooded his insides as the lube continued to warm up and tingle. More pooled at his feet on the tub but he didn’t care, slowly thrusting his finger into himself to spread that luscious warm feeling through himself more intently. Each thrust caused his balls to tighten as his cock hardened like steel, harder than he’d ever been as he panted and squirmed at the alien feelings flooding his bowels. The lube ran down his legs wetly, the same tingling sensation following even as it pooled fully at his feet, his toes squirming through the thick rubbery goop until they were fully coated as well. He’d put a single finger into himself so easily he thought, perhaps another would go in just as easily? With a few rough starts he finally slipped a finger deep into his ass along with the first, squirming and panting as the pleasurable stretching caused his cock to ache. He shakily moved a hand to his rock hard member, slicking it up with the lube as he started to stroke himself wildly as he played with his ass. The tingling feelings running through his cock and ass and the musky almost male like scent drove him over the edge early, his orgasm erupting from his body as if stolen as his cum spattered the walls of the shower. He panted, catching his breath at the sudden explosion, wiping his hand along the wall before sliding out of the bath with a groan as his fingers slipped wetly from his ass. He flicked the water on, washing his feet and washing the black lube down the drain before padding back to his room to grab for the dildo. It was going to be a long night and the lube was still just as slick and warming as it had been minutes before his orgasm. Forgetting homework and chores, Alex spent the night fucking himself senseless with his sisters dildo until he passed out in a mess of cum and the black rubbery lube.

He was shocked awake the next morning by a hammering on his door, his sister screaming about getting ready for school. He glanced around at the mess with a groan but padded into the shower to wash himself of the nights pervious events though didn’t notice that the lube from the pervious night was still smeared on the wall and clung to the floor as if it had merely merged with the existing plastic. The entire day at school from there was a buzz of excitement as he convinced himself he could go back to the store once he was let out, every class one more hurdle to the eventual end of the day. With the final ring of the bell he burst from his chair with vigor and energy even he didn’t know he had, running through the hallways with an almost giddy look as he thought about the night before as his ass still tingled warmly. He just felt so good and as he approached the store he finally saw it’s title. “Animal Desires”. No one seemed to be outside and a quick glance within revealed the store to be completely empty as well, giving him the chance he was waiting for. He slipped through the doors, a small chime sounding but he didn’t care as he searched the many shelves for that awesome lube to no avail. As he was about to give up looking through more shelves of bottled perfumes and penis shaped candies he felt a familar weight on his shoulder, causing him to jump and yelp in surprise as he whirled around. The man from the previous day stood in front of him with that strange knowing look and piercing green eyes, keeping his hand firmly on the boys shoulder. “Well hey there kiddo...knew you’d be back. What’cha looking for?” he asked with that warming smile, Alex’s heart melting under it’s heat. He stammered at first but something in him prompted him to speak up. “T-The Exolube that y-you gave me as a sample.” he muttered softly though felt a reassuring squeeze to his shoulder which caused him to look back up at the older man almost hopefully. “We’ve got that in the back, why don’t you come and take a look at some of our other stuff? We cater to all sorts of clients...the Exolube is really good for...tight fits.” he chuckles. “What’s your name by the way? I’m John.” Alex paused at the mention of the lube and it’s cover catchphrase but followed as he was led into the back of the store. “A-Alex.” he mumbles a little louder as John opened a large metal door revealing a large set of stairs winding down into the basement. “A-And I’m eighteen.” he stated loudly, proudly as he walked own the metal stairs with more confidence with each step. John only chuckled at the exclamation before swinging open another pair of large metal doors but nothing could prepare him for what he saw. Leather suits lined the walls of the well lit room, their heads shaped like various animals with long tails hanging to the ground in some cases. A huge display of the Exolube lined another wall between what looked like a horse and dog costume. He gaped, another squeeze at his shoulder only bringing him from his stunned silence after a long moment. “Like I said...we service quite a number of special clients.” John chuckled though moved away from Alex with a wink. “I have to go to the store room....just look around and take what you need. Call it...our first customer bonus. I’ll make you a tab.” he chuckled louder before slipping away behind another pair of large metal doors without even waiting for a reply. Alex couldn’t even believe his eyes at half the stuff in this area of the store, animal shaped dildos of realistic and fantastical creatures were on open display, the centerpiece of one of the many displays that of a sixteen inch dildo made of thick rubber in the shape of a horse cock that made his heart leap into his throat in a mix of embarrassment and curiosity. He didn’t want to linger though, embarrassment slowly overtaking his more lustful thoughts. He snatched a bottle of the Exolube, the largest he could grab before glancing around until his eyes fell on the large horse cock dildo. The thing practically called to him and before even thinking he rushed over and grabbed it as well before fleeing the odd store as he shoved both the items into his baggy pants to hide them. Unknown to him, John the store owner watched him from the security room with a sly grin. Alex practically sprinted home, diving into his room to hide his items under his bed as quickly as he could before his eyes fell on the mess from the morning. His sheets were stained a yellowy white and black, stuck together in large bunches. He’d wash them that night when everyone else was asleep so he wouldn’t get caught and he hoped the black tarry lube would wash out like it had in the shower. The rest of the night went smoothly, eating dinner with his parents and sister though the strange heat in his ass from earlier that day slowly returned with no hope of subsiding. He excused himself quickly after eating as the heat started to permeate his body, the tingling excitement practically bubbling dove onto his bed. He was hornier than he’d ever been, his cock twitching as it engorged with blood merely at the feel of his boxers sliding against it to expose it to the night air. He panted weakly, reaching under the bed for the Exolube, fumbling at the cap. Thankfully the larger bottle had a large hose and pump attachment which he hastily screwed on before pumping a large glob into his waiting hand. The smell, if anything, was even more intense and almost fresh. The scent was even more strongly of male and rubber and the liquid was much more viscous and sticky than the sampler bottle which he was thankful for. He rolled onto his stomach as he had the night before, applying the quickly warming goop between his ass cheeks before probing into himself with it’s lusty warmth. First one finger slipped into his ass, followed by another and swiftly another as his anus stretched around his fingers with ease, the pleasure washing through Alex’s mind enough to not even question how a simple lube could cause him to stretch more than ever before.

He fumbled for the silver dildo he’d left out, the outsides black still with only bites of it’s former color shining through. He moved his fingers though filled himself quickly with the vibrating length, clamping his mouth shut swiftly to stifle a pleasured scream. He waited a long moment, staggering to his door to lock it once more as he clenched around the vibrating length between his cheeks. The added stimulation made the tingling warmth grow into a burning fire in his loins, his cock throbbing in time with his heart beat as he flopped back against the bed. He moved a hand back to thrust the toy in, almost losing it completely as if his ass could hold the whole length. He clenched, moaning wildly as he finally freed the vibrating toy from his body long enough to catch a breath and try to settle his mind. He needed something bigger and even before he knew it his hands were fishing for the dildo he’d bought hours before. He marvled at it for a moment, his mouth watering as he traced every detail. The horse cock was well defined, sculpted almost as each vein was visible along with the medial ring. He staggered to the shower after grabbing the bottle of Exolube, quick to squirt several shots of the mess onto the length, using his hands to spread it along it entirely before hopping into the shower. He marveled at the thick length, considering there was no way it was going to fit but he sure was going to try until his eyes fell on the black smear against the wall. He paused, moving to inspect the stain with a soft sigh. More of a mess to clean, he was sure that the lube had washed off the night before. He’d just have to scrub it off later when his sheets were cleaning. But none of that mattered as the heat continued to suffuse his body, growing more intense the more his mind remained focused on the massive toy in his hand and the need to cum his cock was so insistently conveying. Any fear he may have had over the massive toy quickly subsided as he took another look at it glistening under the light of the bathroom. He reached back with the floopy piece of rubber, arching his ass into the air before placing the broad head against his asshole. With a surprised grunt he felt the tip slip in though any discomfort was swiftly dissolved as the heat of the lube washed over his body, his cock throbbing harder in response. Each inch slide in slowly, stretching him far wider than he ever thought possible, especially with such a massive thing in his untrained ass. But each inch slid in comfortably until he felt like he couldn’t press more in, the slickness of the lube on the massive member seeming to have run dry but it didn’t matter. He merely let the pleasure wash over him, his eyes closed blissfully as the soft sounds of stringy lube hit the bottom of the bath. He reached over for another squirt of the miracle lube, slathering it over his cock as he stroked himself in time to his thrusts as he started out slow. Each thrust caused more of the lube to leak out around the massive cock, dripping to the floor in rivulets and puddles. The slick lube covered his front completely as his hand worked furiously over his rod, release always seeming just a moment away. This kept his mind unfocused as the spindly rivulets of lube slowly started to connect to the puddles on the ground, expanding and thickening into a pair of broad and muscular legs. More of the body started to expand, connecting to the base of the massive horse cock until the goop solidified around the unaware boys hand, moving up to form a pair a set of washer board abs connected to thick hips and an Appollo’s belt. Alex remained unaware, the slowly forming body thrusting in time with his hand, finally striking against his prostate which caused his whole body to twitch. He whimpered and cried weakly as his orgasm remained out of reach, each passing second maddening but he couldn’t stop. A pair of muscular arms and shoulders formed from the ever growing rubber creature, thick fingers bursting out of the hands though the thing remained motionless save for it’s hips, pumping harder into Alex until the boy gave out a final and shrill cry as he came. His body spasmed around the massive cock in his ass, cumming more and more until he felt like he was going to pass out from the pleasure. But just as it had started, he slowly melted as his knees threatened to give way underneath him. He gasped, his mind fuzzy as he slowly tried to pull the massive dick from his ass to no avail. He frowned as he felt the resistance, his hand seeming stuck the thing causing him to glance back though for the second time that day he was at a loss of words for what he saw. A massive equine form stood above him, easily seven foot and formed of seemless black rubber as the head finally finished. He started to scream but a massive pawed hand moved over his mouth to silence him, the musky scent of the Exolube filling his nose and lungs as he inhaled in surprise. The hand was sticky and warm just like the lube, lulling him as he inhaled more of the luscious scent. The massive horse man made a soft whiney, pulling the boy back against it’s massive body, more of the sticky lube sliding along his thin pale back. He couldn’t resist, the horse man so strong and warm as it started to slide that massive dick into him once again, causing Alex to ease in it’s grip. Each thrust caused the massive cock to slide deeper until the whole of the horsecock slide into him with each rock of the beasts hips.

It’s hands moved over his slim chest, coating him with the thick lube until he was coated from the shoulders down. He’d never been more content, his whole body warm and tingly, the pleasure of being so completly stuffed causing his mind to blank until it felt as if his whole body was being fucked. Had the boy retained his senses he would have seen that with each thrust more and more of his body sunk into the horse creature until only his shoulders hung out of the massive chest. The beast moved it’s hands to the towering pillar of meat to stroke with pleasured neighs and hoof stomps, the pleasure for Alex mind blowing as the creature moved to lather his face with it’s tongue. With each lick he grew more weary until he closed his eyes fully, his body feeling as if it was falling through clouds before disappearing completely as his face slide into the chest of the horse creature. The beast stood still for a long moment before gasping, glancing around in a confused haze as it moved about the shower stall loudly. It was like he’d just woken up from a crazy dream but as Alex looked down at his new body his blood ran cold, or it would have if he had blood. He tugged at the rubber flesh, felt himself up but every touch only caused his lust to burn as brightly as ever in an instant. He couldn’t believe his eyes, feeling his ears flick and move about of their own accord until a voice entered his mind. “Spread.” it ordered, his body aching wildly and arching as he tried to piece everything out. “Spread!” the voice echoed in his head again, sounding like crashing thunder as he fell to his knees. He tried to cling to his memories but as the voice flooded his mind he felt more and more of his memories fading away, only to be replaced with powerful rubber men with massive cocks fucking and pleasuring one another in a massive orgy. His body stood as if on it’s own power, his massive cock throbbing to full life as he glanced around. His nose sniffed the air, smelling other humans in the house. The orders in his head had only intensified, drowning out any questions or complaints as he moved his massive body out of the shower. He continued to sniff at the air, staggering out into the hallway without a care as the scent of a young girl started to fill his nose more fully. Young women loved horses and Alex was a stallion. Using his memories of his former sister and life he made his way to her door, not even bothering to knock. The sound of the door alerted the young girl, brushing her auburn hair before she spotted the towering hulk of a creature.

She made to scream and run but the beast was deceptively fast, moving to grab the young girl by the hair and slam her mouth around the head of his cock. The young girls mouth stretched painfully, unable to fit more of the massive tool past her lips but the creature didn’t care. Thick pre shot into the girls mouth, musky and thick she could practically chew the gunk but the more she tasted the more she didn’t care to resist. Soon she was sucking and slurping at the cock, tongue fucking the slit for more of the heavenly pre-seed that leaked from it almost like a fountain. The more she swallowed the more heat she felt feel her body, her hands moving to help stroke the wonderful beast off for more of it’s wonderful seed. Alex snorted and moaned in pleasure as his former sister worked over his tool, more of his meat slipping into her mouth as her face pushed out to a more equine shape. But Alex couldn’t continue this forever, pulling away to the whine of the transforming human though he moved without a care for her concern. He lifted the slowly blackening human and tossed her to the bed, her skin growing sticky and black like his own as it burned through her clothing to reveal his prize. The young woman’s bare ass swayed in invitation, a hand down at her crotch to cover it in the sticky rubber that was slowly coating and transforming her body. Alex groaned as he looked over his sisters pert ass and virgin pucker though leaned in to ram his massive cock deep into her with a single motion causing her to scream out though her voice was swiftly deepening to a deep baritone. With each thrust of the massive dick her body trembled, her breasts shrinking and melting into her body as she felt the sticky pre-cum from her former brother leak out of her ass. Her body started to inflate as she absorbed more and more of the powerful cum into herself, her chest broadening and gaining muscle mass as more of the liquid slide against her covered pussy to grow into a familiar spire of flesh that almost reached his lips. The pleasure drowned out his mind swiftly, his lips moving to his newly formed cock to drink his own juices down as he was pounded from behind by his brother. They shared their lust equally, screaming and pounding against the floor until finally the former woman was just another powerfully built horseman being fucked from behind. Both rushed towards their climax in a frenzy, the former woman sucking and slurping along her dick until it exploded it’s bounty into his mouth. Alex gave a final thrust as he buried his cock deep into the other man’s ass, flooding his rubbery insides with his cum. However their noises didn’t go unnoticed and as they basked in the afterglow they watched the door open slowly. An older woman stood in horrified shock at the sight of the two rubber horse men, frozen in place before the two creatures pulled away from each other with devious looks. Before the woman could fight back a two pairs of arms reached out to pull her into the room, closing the door behind her. John went about closing his store, the last few customers hurrying from the building discreetly as he flicked off the lights. Once he’d finished closing he wove his way back to the basement and into the security room, glancing at the displays until he found the one he was looking for. “Cock monitor 1“ was active, displaying three large horsemen fucking a defenseless older man who was swiftly turning into a horseman himself. The sight gave John a soft smile, flicking a switch on the monitor before intoning into a large mic that slide from the ceiling. “Return.” he chanted for several moments before turning the mic off. He glanced at another screen, a whole room of massive horsemen having their cocks milked into bottles of Exolube. Business would be booming here soon enough.