Jake had been staring at Mark's cock for weeks, imagining what it would feel like splitting him open. They were both twenty-three, roommates who had crossed the line from friends to fuck buddies after too many beers and one sloppy handjob that turned into a full night of sucking each other off. But anal was different. Jake had never taken a dick up his ass, and Mark knew it. Tonight Mark was done waiting.
"Strip and get on the bed," Mark said, voice low and rough. "On your stomach, ass up."
Jake's heart hammered as he peeled off his clothes. His own cock was already hard, leaking at the tip. He climbed onto the mattress and pushed his hips back, feeling exposed. Mark didn't waste time with sweet talk. He spit on Jake's hole and rubbed the slick mess around with two fingers, pressing just enough to make Jake twitch.
"Fuck, you're tight," Mark growled. "Gonna stretch this virgin hole wide."
He worked one finger in, then two, pumping them slow and deliberate. Jake grunted into the pillow, pushing back despite the burn. Mark added more spit, twisting his fingers deeper until they brushed that spot inside that made Jake's cock jerk and drip onto the sheets.
"Ready for the real thing?" Mark asked, not really asking. He lined up his thick cock and pushed the head against Jake's entrance. The pressure built fast. Jake hissed as the blunt head popped past the ring, the stretch sharp and immediate.
"Shit, it's big," Jake muttered.
"Shut up and take it." Mark gripped Jake's hips and shoved in another inch, then another. He didn't stop until his balls pressed against Jake's ass, buried to the hilt in one steady thrust. Jake's breath came in short gasps, the fullness overwhelming. His hole clenched around the invading cock, trying to adjust to the thickness.
Mark pulled back halfway and slammed in again. The pace stayed hard and direct, skin slapping skin with every thrust. Jake felt every vein, every pulse of Mark's cock dragging along his inner walls.

The pain faded into a raw, grinding pleasure that made his own dick throb untouched.
Mark reached under and wrapped a hand around Jake's cock, stroking it in time with his thrusts. "Look at you, taking cock like a slut already. First time and you're pushing back for more."
Jake moaned, the dirty words hitting harder than he expected. Mark picked up speed, pounding deep, the bed creaking under them. Sweat slicked their bodies. Every thrust forced a grunt from Jake's throat. His hole burned in the best way, stretched and used.
Mark pulled out suddenly, flipped Jake onto his back, and shoved back in. Now Jake could see the hunger on his face. Mark hooked Jake's legs over his shoulders and drove in harder, angling to nail that prostate with every stroke. Jake's cock bounced against his stomach, leaking steadily.
"Gonna fill you up," Mark warned, voice tight. His thrusts turned short and brutal. Jake felt the cock swell inside him right before Mark groaned and unloaded, hot pulses flooding his guts. The sensation pushed Jake over the edge. He came untouched, ropes of cum striping his chest and stomach while his ass milked Mark's cock dry.
Mark stayed buried deep for a long minute, breathing hard. When he finally pulled out, Jake felt the mess leak from his used hole. They lay side by side, catching their breath.
"Next time I'm going slower," Mark said, but the smirk said he was already planning round two. Jake just smiled, sore and satisfied, already knowing he wanted it again.