Jack Harkness vs The Doctor
Jack Harkness circled the Tenth Doctor in the dim, humming bowels of the abandoned spaceship, the air thick with the metallic tang of recycled oxygen and the faint ozone crackle from flickering emergency lights overhead. The bulkheads loomed close, scarred metal panels vibrating faintly from the ship's dormant engines, forcing the two men into tight proximity. Jack's leather coat hung open, his broad chest heaving with anticipation, the scent of his sweat already sharpening the confined space. The Doctor, in his pinstriped suit, trousers rumpled from their initial grapple, eyed him warily, his trainers scuffing against the grated floor as he shifted stance.
"You sure about this, Doctor?" Jack grinned, voice low and rough, laced with that immortal hunger. His cock twitched visibly against his trousers, thickening at the thought. "Fight's on. Winner takes all—down the shaft."
The Doctor swallowed, Adam's apple bobbing, his own arousal betraying him as his slacks tented. "Jack, this is mad. We're not—" But Jack lunged, slamming into him shoulder-first. They crashed against a console, sparks flying from the impact, the Doctor's back hitting the unyielding metal with a thud that echoed through the corridor. Jack's hands gripped the Doctor's lapels, yanking him close, their breaths mingling hot and ragged.
The Doctor twisted, elbow jabbing into Jack's ribs, the sharp pain blooming like fire under skin. Jack grunted, taste of blood on his tongue from biting his cheek, but he countered with a knee to the thigh, driving the Doctor's legs apart. They grappled, suits tearing at seams—Jack's shirt ripping open to expose the taut planes of his abs, sweat-slick and gleaming under the red emergency glow. The Doctor's tie came loose, flapping as he shoved Jack back, but Jack was relentless, immortality fueling his stamina. He hooked an arm around the Doctor's neck, pulling him into a headlock while his free hand palmed the growing bulge in the Doctor's pants.
"Feel that?" Jack growled into his ear, fingers squeezing the hardening cock through fabric, the heat pulsing against his palm. "Mine's bigger. Gonna stuff you in it."
The Doctor gasped, hips bucking involuntarily, the friction sending a jolt through him. He broke free with a wild spin, trainers squeaking on the grate, and tackled Jack to the floor. They rolled, the cold metal biting into Jack's spine, then the Doctor's shoulder blades. Fists flew—Jack's knuckles splitting the Doctor's lip, coppery blood smearing across both their faces. The Doctor landed a solid punch to Jack's jaw, bone crunching audibly, but Jack laughed through the pain, blood bubbling at his mouth. "That all you got, Time Lord?"
Jack surged up, pinning the Doctor beneath him, knees bracketing his hips. The ship's hum vibrated up through the floor into their bodies, amplifying every grind. Jack ground down, his massive erection—now fully hard, straining the zipper—pressing insistently against the Doctor's thigh. Precum soaked through, the musky scent flooding Jack's nostrils, making his mouth water. He ripped open the Doctor's shirt, buttons pinging off the walls, exposing pale chest hair damp with sweat. Pinching a nipple hard, Jack twisted, drawing a sharp yelp that vibrated against his own chest.
"Jack—stop," the Doctor panted, but his hands clawed at Jack's back, nails raking red trails that healed almost instantly. Jack's cock throbbed, urethral slit already gaping slightly in his mind's eye, hungry for flesh. He flipped them again, slamming the Doctor's head against the deck—not hard enough to concuss, just to stun. While the Doctor blinked stars from his vision, Jack stripped him roughly: trousers yanked down calves, boxers torn away, leaving the Doctor's cock bobbing free, veined and leaking, balls tight against his body.
The Doctor kicked out, heel connecting with Jack's hip, but Jack absorbed it, shrugging off the bruise. He shed his own clothes in a frenzy—coat shrugged off, trousers kicked aside, his enormous cock springing upright, thicker than the Doctor's wrist, veins pulsing, the slit at the tip already drooling clear fluid that stretched in sticky strands as he stroked himself. The shaft bobbed heavily, foreskin peeled back to reveal the glistening head, the urethral opening flexing like a mouth.
"Time to feed," Jack rasped, grabbing the Doctor's ankles and dragging him across the grate, skin scraping raw. The Doctor thrashed, but Jack pinned his arms with one hand, the other guiding his cockhead to the Doctor's feet. The slit yawned impossibly wide—Jack's immortal biology bending reality just enough—lips of flesh parting with a wet schlick, the heat inside radiating like a furnace.
The Doctor's toes breached first, engulfed in slick, pulsing warmth. The texture inside gripped like velvet muscles, rippling greedily, the salty tang of Jack's precum coating skin. "No—Jack!" the Doctor cried, voice cracking, but his cock jerked, spurting a thin rope of cum onto his belly from the sheer erotic wrongness.
Jack moaned, the stretch exquisite, his shaft ballooning around the calves sliding in. He pumped his hips, forcing more—ankles, shins vanishing into the throbbing tube. The bulge traveled up his cock, visible under the taut skin, distorting veins. Jack's hand followed it, petting the outline of feet pressing outward, fingers tracing the ridge. "Fuck, yeah. Feel you squirming in there, Doctor. So tight."
The Doctor twisted, shoulders scraping the floor as Jack hauled him upright against the console, knees buckling. Jack's free hand fisted the Doctor's hair, shoving his head toward the swelling shaft—now midway up the thighs, the outline of knees bulging obscenely. Precum bubbled from the slit, dripping hot down the embedded legs, the scent heady and animal. Jack thrust forward, cock slurping over knees with a lewd glorp, the internal walls massaging relentlessly, muscles contracting in peristaltic waves.
Halfway in, the Doctor's cock dragged against Jack's shaft exterior, smearing cum trails. Jack reached down, stroking it roughly while petting the massive bulge snaking toward his base. "Gonna melt you down, Doctor. Turn that Time Lord brain to spunk." His balls churned below, already swelling in anticipation, heavy and pendulous.
The Doctor's hips breached next—ass cheeks squeezing into the slit, the rim clamping around his waist like a fleshy cockring. Jack groaned, the pressure on his prostate sending sparks up his spine, his own cockhead flaring wider. Inside, the Doctor writhed, muffled cries vibrating through the shaft, every kick and twist massaging Jack's sensitive inner walls. The bulge elongated, shaft distended to twice its girth, skin stretched translucent over wriggling limbs. Jack's hand roamed it reverently, thumb pressing into the curve of a hip, feeling bones shift.
"Almost... there," Jack panted, sweat dripping from his brow onto the throbbing length. He gripped the Doctor's shoulders, forcing them in—arms pinned to sides, head tilting back as the slit crawled over chin, lips, hair. The Doctor's face vanished last, eyes wide in final panic, a gurgle escaping before the urethral mouth sealed with a wet snap. Jack's cock pulsed triumphantly, the entire form outlined: head at the base now, feet pressing the midpoint, every contour visible as it descended.
Jack stroked the descending bulge languidly, hand gliding from tip to balls, feeling the Doctor slide deeper. The texture under his palm was fever-hot, muscles rippling in rhythmic swallows, pulling the load toward his sack. Precum oozed from the slit in thick rivulets, pooling on the grate with a splatter, the salty musk overpowering the ship's sterile air. His balls inflated as the feet finally slipped free of the shaft, dropping into the churning orbs with a heavy slosh audible even over the hum.
Fully encased, the Doctor's form bloated Jack's scrotum—each testicle sagging low, stretched to beachball size, the faint imprint of a curled body pressing outward, limbs folding fetal. Jack cupped them, hefting the weight, the skin velvety-smooth and taut, heat radiating through his palms. Inside, churning acids tingled to life—slow at first, a warm fizz against flesh, the Doctor's struggles weakening into twitches. Jack moaned, leaning against the console, legs spread wide as the melting accelerated. Gurgling sounds bubbled from his balls, wet sloshing accompanying the softening—bones dissolving to slurry, muscles liquefying into thick cream.
"Fuck, you're turning to cum so good," Jack murmured, kneading the shrinking bulges. The Doctor's outline blurred, form compressing into roiling seed, balls contracting with each pulse. Pressure built in Jack's groin, cock rigid and dripping, veins throbbing. He jerked himself furiously now, fist slick with his own output, the scent of churning spunk thickening the air—musky, fertile, overpowering.
Climax hit like a freight train. Jack roared, back arching off the bulkhead, cock erupting in geysers of pent-up load. The first blast painted the opposite wall white, thick ropes splattering with wet thwacks, steaming from heat. He aimed lower, hosing the floor, console, his own thighs—cum arcing in endless spurts, the volume impossible, Doctor-reduced seed flooding the corridor ankle-deep. Each pulse clenched his balls empty, the sloshing fading to softness, the salty deluge carrying faint echoes of Time Lord essence.
Jack sank to his knees in the pooling mess, cock still twitching dribbles, chest heaving. The ship groaned around him, lights flickering brighter, but he just grinned, immortal hunger sated—for now.