Jake stepped into the private exam room, already naked under the thin gown they made him wear. The doctor, a thick-built guy in his forties named Dr. Hale, barely looked up from his clipboard. "On the table.

Face down first. Legs spread." His voice was flat, like he did this every day.
Jake climbed up, the paper crinkling under his knees. Dr. Hale didn't waste time. Thick leather cuffs snapped around his wrists and yanked them out to the sides, locking them to the table rails. Another set went around his ankles, spreading him wide until his hole was exposed to the cool air. A wide strap went over his lower back, cinching tight so he couldn't lift his hips even an inch.
"Deep breath," Dr. Hale said. A gloved finger pushed lube straight into Jake's ass without warning, twisting and stretching. Jake grunted, cock already twitching against the table. The finger pulled out and something thicker replaced it—a smooth metal plug, cold and unyielding. It slid in slow, then locked in place with a twist. Jake's hole clenched around the base.
Dr. Hale walked around the table, adjusting straps. One went across Jake's shoulders. Another over his thighs. Every buckle clicked louder than the last. When he was finished, Jake couldn't move more than an inch in any direction. His cock hung heavy and leaking between his spread legs.
"Let's check your response," the doctor muttered. He flicked the plug, making it vibrate inside Jake. Then a warm hand wrapped around Jake's balls, squeezing just hard enough to make him moan. Fingers stroked up the shaft, slow and rough, thumb smearing the precum around the head. Jake tried to thrust but the straps held him flat.
Dr. Hale kept working him like that for minutes, never letting him get close. Every time Jake's breathing sped up, the hand stopped. The plug stayed buried, buzzing low. Sweat slicked Jake's back. His hole ached around the metal.
Finally the doctor stepped between his legs. The plug came out with a wet pop. Jake felt empty for half a second before something bigger pressed in—Dr. Hale's thick cock, bare and slick with lube. It pushed past the ring of muscle in one steady thrust, bottoming out deep. Jake groaned loud, the sound echoing off the tile walls.
The doctor fucked him hard and steady, hips slapping against Jake's strapped-down ass. One hand gripped the back of Jake's neck, holding him down even though the restraints already did the job. The other reached under to jerk his cock in time with each thrust. "Don't come until I say," Dr. Hale ordered, voice still calm.
Jake's cock throbbed in the doctor's fist. Every slam hit his prostate, sending sparks up his spine. The straps creaked as he strained against them. His balls drew up tight. He begged, voice hoarse, but the doctor just fucked him deeper, balls slapping against skin.
When Dr. Hale finally grunted and unloaded inside him, hot and thick, he kept stroking Jake's cock until Jake shot all over the table, ropes of cum hitting the paper and floor. The doctor stayed buried until he softened, then pulled out slow, watching the mess leak from Jake's hole.
He undid the straps one by one, but left the wrist cuffs on. "Same time next week," he said, wiping his hands. "Don't clean up before you come in."
Jake stood on shaky legs, cum still dripping down his thigh, already thinking about the next appointment.