Chapter 3: Leg Day Domination
The metallic shriek of overloaded bearings cut through the gym's usual din. Mark lay back on the 45-degree leg press, bare feet planted wide on the steel platform. David watched, a cold bottle of water forgotten in his hand, as Mark’s tree-trunk thighs strained against a mountain of iron. Seven plates a side. Seven-fucking-fifty. More than most men dream of deadlifting.
Mark took a series of sharp, explosive breaths, his massive chest heaving. The safety catches were off. Pure balls-out lift. With a guttural roar that echoed off the distant walls, he drove with his legs. The sled, burdened with enough weight to crush a car, began to move. Slowly, agonizingly. Inch by grinding inch.
David’s eyes were glued to Mark’s quads. They didn’t just flex; they detonated. The vast, rounded heads of his quadriceps surged outward, splitting into distinct, mountainous peaks. Veins, thick as electrical cables and dark as bruises, erupted across the swollen flesh, branching and pulsing under the fluorescent lights. The skin, stretched impossibly taut, took on a sheen of sweat and effort, highlighting every striation, every fiber bundle screaming under the load.
Mark lowered the weight with torturous control, thighs trembling but never yielding, his hamstrings bulging like cannonballs behind his knees. Then, the explosive drive back up. Each rep was a seismic event. David could swear he heard the muscles groaning, fibers tearing and knitting back thicker in real-time. Sweat poured in rivers down Mark’s legs, pooling on the vinyl seat. On the eighth rep, a sound ripped from Mark’s throat – part agony, part savage triumph – as he locked out, holding the impossible weight at full extension. The quads were monstrous, grotesque in their size and vascularity, veins webbing across the surface like a roadmap to hell.
He slammed the safety catches back on with a heavy CLUNK, collapsing back, chest heaving. His legs… they looked transformed. Even at rest, pumped beyond belief, they seemed to have gained inches. The sweep was unreal, the separation between muscle groups unnaturally deep, the skin pulled drum-tight. David approached slowly, the tape measure already clutched in his sweaty palm, drawn like a moth to a furnace.
"Fuckin' hell, Mark," David breathed, stopping just short of the machine. "Look at your wheels. They look… alive."
Mark grinned, a feral flash of teeth against his flushed face. Sweat dripped from his jaw onto his swollen chest. "Felt it," he rasped, slapping his own thigh. The sound was like hitting a side of beef. The muscle jiggled minimally, rock-hard underneath. "Felt 'em fuckin' grow. Tape 'em. Now. Quads. Right fuckin' now."
David knelt beside the machine, the rubber floor gritty under his knees. The heat radiating from Mark’s legs was intense, the smell of salt and raw power overpowering. He positioned the cold steel tape just above Mark’s knee, his fingers trembling against skin that felt hot enough to brand. The sheer density was staggering. He brought the tape around the thickest part of the thigh, high up near the hip. He had to lean in, his face inches from the pulsing, veined mass. The numbers swam. He blinked. "Forty… forty-five," he choked out, disbelief warring with a sickening arousal. "Forty-five inches, Mark. Jesus fucking Christ."
Mark’s laugh was a low, satisfied thunder. "Growth spurt," he rumbled, echoing his locker room declaration. He flexed his right quad deliberately. The muscle surged, hardening into a veined boulder, the peak climbing impossibly high. "See that separation? Like fuckin' granite." His eyes, dark and hungry, fixed on David kneeling before him. "Worship it, Dave. Worship these fuckin' trees."
The command, the proximity to that terrifying, magnificent mass of muscle… David’s resistance crumbled. A low moan escaped him as he pressed his open mouth against the hot, sweat-slicked swell of Mark’s vast outer quad. The taste was salt and iron and pure exertion. He licked a long stripe up a bulging vein, traced the deep groove separating quad from hamstring with his tongue. He buried his face in the dense muscle, inhaling the raw, animal musk, his hands coming up to grasp the thick slabs, kneading them desperately. They felt unyielding, yet alive, humming with residual power. "So fucking huge," David mumbled, his voice muffled against the hot skin. "Hard… so fucking hard… perfect monsters."
"Damn right," Mark growled. His massive hand landed on the back of David’s head, not guiding, but forcing him down, grinding his face harder into the muscle. "Lick it. Suck it. Show my fuckin’ quads how bad you want 'em."
David obeyed with frantic devotion. He kissed, licked, sucked at the dense flesh, tracing every vein, every striation with his tongue, worshipping the brutal architecture of power. He bit down gently on a thick ridge of muscle, eliciting a deep groan from Mark. David’s free hand slid lower, over the dense curve of Mark’s inner thigh, perilously close to the straining bulge in his shorts. The heat there was volcanic.
Suddenly, Mark’s hand tightened painfully in David’s hair, yanking his head back. Mark’s eyes burned down at him, pupils blown wide with lust. "Enough teasin', muscle pig," he snarled. His other hand shoved roughly at David’s shoulder. "On your back. Under the sled. Now."
David scrambled backwards on the rubber floor, his heart hammering against his ribs. He slid beneath the massive leg press sled, lying flat on his back, staring up at the steel framework and the impossible weight suspended above him. Mark stood, his shadow engulfing David. He didn’t remove his shorts. He simply unzipped the fly, freeing his already half-hard cock. It thickened rapidly, springing out, thick as David’s wrist, the heavy head dark and glistening. Mark spat a thick glob of saliva directly onto it, then another onto his fingers. He reached down, his hand huge against David’s chest, and shoved David’s shorts and underwear down to his ankles with brutal efficiency.
David’s cock jutted up, hard and leaking. Mark ignored it. He knelt between David’s spread legs, one massive knee planted on either side of David’s hips, trapping him. The sled loomed inches above them. Mark spat again, this time directly onto David’s exposed hole. He rubbed the spit in roughly with two thick fingers, the intrusion sharp and sudden, stretching the tender ring.
"Still loose from last time," Mark grunted, probing deeper, making David gasp and arch his back. "Good. Takes my dick easier." He spat once more onto his palm, slicking his cock, now fully erect and pulsing. The thick shaft glistened, the swollen head nudging against David’s entrance.
David braced his hands against the cold metal frame of the leg press above him. The weight felt like Damocles’ sword. Mark gripped David’s hips, his fingers digging deep, pulling David’s ass up off the floor. He pushed.
The broad head stretched David brutally. A choked cry tore from David’s throat. Mark didn’t ease in. He drove forward with a powerful thrust of his hips, sheathing his entire monstrous length inside David’s clutching heat in one brutal, unrelenting stroke. David screamed, the sound echoing under the steel sled. The pain was white-hot, tearing, the fullness beyond comprehension. Mark’s cock felt like it was splitting him in two, impaling him to the floor.
"FUCK! MARK! TOO BIG! TOO FUCKIN' DEEP!" David babbled, tears springing to his eyes.
"Takes it," Mark snarled, his voice thick and guttural. He pulled back almost all the way, the thick veined shaft dragging agonizingly against David’s inner walls, then slammed forward again. Hard. The impact drove David’s shoulders into the rubber mat. "Takes my dick, you fuckin' muscle whore. Under all this iron." He hooked David’s legs over his massive, pumped forearms, spreading him wider, bending him almost double, exposing him utterly. He set a brutal, piston-like rhythm. Short, powerful thrusts that hammered into David’s core, each one a fresh assault.
The slap of Mark’s sweaty thighs against David’s ass, the wet squelch of his cock plunging in and out, filled the space under the machine. David’s knuckles were white where he gripped the frame above. With each jackhammering thrust, he could feel the sled tremble slightly. Mark’s breath came in ragged, animalistic grunts. His pumped quad pressed against David’s thigh, the muscle hard as stone, impossibly hot.
"Feel that?" Mark grunted, pistoning harder, deeper, the thick veins on his cock dragging against David’s prostate. "Feel my dick wrecking your hole? Stretching you wider?" He leaned forward, his immense chest blocking David’s view of the sled, his sweat dripping onto David’s face. "Gonna fuck this growth spurt deeper into you, pig."
The relentless pounding, the crushing weight overhead, the overwhelming smell of Mark’s sweat and the hot, musky scent of sex… it coalesced into a terrifying, all-consuming pressure. David’s untouched cock throbbed, leaking precum onto his stomach. The pain was still a deep throb, but the pressure on his prostate was a live wire, sparking through his nerves with every brutal stroke. He couldn't stop himself from pushing back, meeting Mark’s thrusts, chasing the punishing friction. "Oh god… Mark… please…" he begged, the words ragged.
"Please what, slut?" Mark hammered into him, his massive body a piston of muscle and lust.
"Cum! Make me cum!" David screamed, arching against the invasion.
Mark’s hand shot down, his thick fingers wrapping around David’s cock in a brutal grip. He started pumping it roughly, perfectly in time with his jackhammering thrusts. The dual assault obliterated David. He came with a soundless scream, back bowing violently off the mat, cum shooting in thick ropes up his chest and chin. His ass clamped down with vicious, involuntary spasms around the monstrous cock still pistoning inside him, milking it.
"FUCK YES!" Mark roared, his rhythm shattering into frantic, desperate lunges. "Squeeze that cock, you greedy fuckin' hole!" He buried himself to the hilt and held, grinding deep, his massive body locking up in a full-body spasm. His biceps and chest veins exploded as he gripped David’s hips. David felt the hot, thick pulses deep inside him, Mark unloading jet after jet of cum into his well-fucked channel. Mark’s groan was a guttural, bone-death sound of release. He held himself there, impaling David, trembling with the aftershocks, sweat pouring off him, dripping onto David’s heaving chest.
Under the trembling leg press, surrounded by the scent of sex and iron, pinned by 300+ pounds of shuddering muscle, David felt utterly claimed, filled, demolished. Mark slowly pulled his softening cock out with a wet, sucking sound, a fresh trickle of cum leaking from David’s gaping hole onto the mat. Mark slapped his own glistening, still-pumped quad. The sound was a thunderclap in the confined space. "Growth spurt," he panted, a dark, satisfied smile twisting his lips as he looked down at the wreckage beneath him. He zipped his fly. "Forty-five fuckin' inches." He grabbed the sled handles and effortlessly racked the massive weight with one hand, the act casual, obscene. "Shoulders tomorrow. Be ready to worship." He stepped over David and strode towards the water fountain, his colossal legs carrying him away like a conquering god. David lay trembling on the mat, staring up at the steel frame, sticky and broken, already craving the next brutal measure.
David lay trembling on the mat, staring up at the steel frame, sticky and broken, already craving the next brutal measure. The sharp scent of sex and rubber filled his nose, mixing with the lingering ozone of exertion. His ass throbbed, a deep, hot ache where Mark’s monstrous cock had stretched him wide, the thick load already leaking onto the mat beneath him. He heard the heavy tread approaching before he saw the shadow fall over him.
Mark loomed, blotting out the harsh overhead lights, his pumped quads still veined and swollen from the leg press carnage. Water dripped from his jaw onto David’s bare stomach. "Floor's filthy," Mark rumbled, his voice rough from exertion. "Shower. Now." He didn't offer a hand up; the command hung in the humid air, an expectation of immediate obedience. David scrambled to his feet, wincing as his abused hole clenched, pulling his shorts up over sticky skin.
The locker room steam enveloped them, thick and cloying, muffling the distant clatter of weights. Mark strode towards the shower stalls, his massive back a landscape of striated muscle shifting under sweat-slicked skin. He stopped before an end stall, partially shielded by a tiled partition, and turned. His eyes, dark and predatory, locked onto David. "Strip," he ordered, already peeling off his own damp shorts, letting them fall. His cock, thick and heavy even semi-flaccid, swung free, glistening slightly in the damp air. David fumbled with his shorts, fingers clumsy, his own cock twitching back to life despite the soreness.
Mark stepped under the hot spray, the water sluicing down the incredible contours of his chest, shoulders, and back. He flexed his latissimus dorsi deliberately, the wings flaring wide, water cascading down the deep grooves. "Get in here," he commanded, not looking back. David stepped into the stall, the hot water hitting his skin, washing away some of the grime but not the deep-seated feeling of being used. The stall felt cramped with Mark’s immense presence, the tile cool against David’s back as he pressed himself against it.
Mark turned, facing him fully under the spray. His cock, fully engorged now by the heat and proximity, jutted out thick and demanding, the heavy head dark and slick. Veins snaked along its formidable length. He reached out, his huge hand wrapping around the back of David’s neck, pulling him forward roughly. "Kneel," Mark growled, the sound vibrating through David’s skull. David sank to his knees on the wet tile, the water pounding his shoulders, his face level with Mark’s groin. The musky scent of sweat, sex, and clean male skin filled his nostrils, overpowering the chlorine.
Mark’s fist closed in David’s hair, forcing his head forward. "Open," he commanded. David parted his lips, tilting his head back, eyes fixed on the intimidating girth before him. Mark guided himself, the broad, slick head pressing against David’s lips. "Wider, pig," Mark snarled. David strained, jaw aching, as Mark pushed forward. The thick crown stretched David’s lips obscenely wide before forcing its way past his teeth. David gagged instantly, saliva pooling, his throat reflexively clenching against the invasion.
Mark pushed deeper, ignoring the choked sounds. The thick shaft filled David’s mouth, pressing down his tongue, threatening his airway. David’s eyes watered. Mark held his head steady, his hips thrusting shallowly, fucking David’s face with slow, deliberate strokes. "Suck it," Mark ordered, his voice thick with lust. "Get it wet for that fucked hole of yours." David tried to hollow his cheeks, his tongue flattening against the veined underside, tasting salt and skin. The sheer size made proper suction impossible; it was about submission, about taking what was given.
Mark pulled back slightly, letting David gasp for air, saliva and water dripping from his chin. "Good pig," Mark murmured, a dark approval in his tone. He pushed back in, deeper this time, the head bumping the back of David’s throat. David gagged violently, tears mixing with the shower spray. Mark held him there for a long moment, feeling the convulsive spasms around his cockhead, before withdrawing again. "Turn around," he rasped, releasing David’s hair. "Hands on the wall. Ass out."
David scrambled to obey, turning to face the wet tile, bracing his hands flat against the cool surface. He spread his legs, presenting himself, the hot water streaming down his back and over his exposed ass. He felt Mark’s massive hand land on his hip, rough and possessive. Another hand, slick with soap or spit, roughly smeared over his hole. "Still loose," Mark grunted, a thick finger probing past the tender ring, stretching him briefly. "Good. Takes my dick."
Mark spat thickly, the sound loud over the water, directly onto David’s entrance. He used his cockhead, broad and insistent, to smear the saliva around David’s twitching hole. The pressure built, immense and unyielding. David braced, pushing back slightly, welcoming the violation he craved. Mark gripped David’s hips hard enough to bruise, anchoring him. He pushed.
The broad head stretched David brutally, a familiar, tearing burn radiating through his pelvis. Mark didn’t ease in. He drove forward with a powerful thrust of his hips, sheathing his entire monstrous length inside David’s clutching heat in one brutal, unrelenting stroke. David screamed, the sound echoing off the tiles, his forehead slamming against the wall. The pain was blinding, white-hot, the fullness beyond comprehension, deeper and more invasive than under the leg press. Mark’s cock felt like it was rearranging his guts.
"FUCK! YES!" Mark roared, his voice raw and triumphant. He pulled back almost all the way, the thick, veined shaft dragging agonizingly against David’s inner walls, then slammed forward again. Hard. The impact drove David harder against the tile. "Takes it all, you muscle-hungry slut!" Mark hooked one massive arm around David’s chest, pinning him against the wall, his other hand gripping David’s hip bone. He set a brutal, jackhammering rhythm. Short, piston-like thrusts that hammered into David’s core, each one a fresh assault on his senses.
The slap of Mark’s sweat-slicked thighs against David’s ass, the wet squelch of his cock plunging in and out, filled the steamy stall, louder than the shower spray. David’s knuckles were white where he pressed against the tile. With each jackhammering thrust, he felt the immense power radiating from Mark’s body, the pumped muscles in his arms and back straining. Mark’s breath came in ragged, animalistic grunts near David’s ear. "Feel that?" Mark snarled, pistoning harder, deeper, the thick veins on his cock dragging against David’s prostate. "Feel my dick wrecking your hole? Stretching you wider?" He bit David’s shoulder, hard. "Gonna pump this growth spurt deeper into you."
The relentless pounding, the scalding water, the overwhelming smell of Mark’s sweat and the hot, musky scent of sex… it coalesced into terrifying, all-consuming pressure. David’s untouched cock throbbed against the cold tile, leaking precum diluted by the spray. The pain was a deep, resonant throb, but the pressure on his prostate was a live wire, sparking through his nerves with every brutal stroke. He couldn't stop himself from pushing back, meeting Mark’s thrusts, chasing the punishing friction. "Oh god… Mark… please…" he begged, the words ragged, lost in steam and grunts.
"Please what, cocksleeve?" Mark hammered into him, his massive body a piston of muscle and lust. "Cum? You gonna cum untouched while I wreck your hole?" He hooked his arm tighter around David’s chest, pulling him impossibly tighter against each thrust. The dual sensation – the brutal invasion from behind, the crushing pressure on his front – shattered David. He came with a soundless scream, back bowing violently away from the wall, cum pulsing out in weak spurts against the wet tile, washed away instantly. His ass clamped down with vicious, involuntary spasms around the monstrous cock still pistoning inside him, milking it.
"FUCK YES!" Mark roared, his rhythm shattering into frantic, desperate lunges. "Squeeze that cock, you greedy fuckin' hole!" He buried himself to the hilt and held, grinding deep, his massive body locking up in a full-body spasm. His biceps and chest veins exploded as he gripped David. David felt the hot, thick pulses deep inside him, Mark unloading jet after jet of cum into his well-fucked channel. Mark’s groan was a guttural, primal sound of release, vibrating through David’s pinned body. He held himself there, impaling David, trembling with the aftershocks, sweat pouring off him, mixing with the shower spray.
Pinned against the shuddering tile, filled with Mark’s seed, surrounded by steam and the echoes of their coupling, David felt utterly claimed, demolished, rebuilt only for this purpose. Mark slowly pulled his softening cock out with a wet, sucking sound, a fresh trickle of cum leaking from David’s gaping hole, quickly washed away by the water. Mark slapped his own glistening pec, the sound sharp in the confined stall. "Growth spurt," he panted, a dark, satisfied smile twisting his lips as he looked down at David slumped against the wall. He turned off the water. The sudden silence was deafening. "Shoulders tomorrow," Mark stated, stepping out and grabbing a towel. "Bring the tape." He strode towards the lockers, leaving David trembling under the dripping showerhead, water cooling on his skin, the phantom stretch of Mark’s massive cock already a haunting promise.