I never planned on getting fucked that night. I was just some straight guy minding his own business after a late shift, cutting through the old warehouse district on the way home. The guy came out of nowhere. Big, rough hands grabbed me from behind, shoved me into a dark loading bay. "Don't fucking move," he growled in my ear. His voice was low and mean. Before I could yell, he had my arms pinned and a knee in my back.
He ripped my shirt open, buttons popping everywhere. His hands were calloused as they yanked my jeans down to my knees. I struggled, but he was stronger. "What the fuck, man? I'm not gay!" I shouted. He laughed, a dirty sound, and pressed his hard cock against my ass through his pants. "You will be," he said. He spat on his fingers and shoved two right into my hole without warning. It burned like hell. I bucked and cursed, but he worked them in deep, twisting, stretching me open.
My cock stayed soft at first. I was straight, damn it. But he kept at it, fingering my ass rough and fast while his other hand reached around and stroked me. "Look at that," he muttered. "Starting to get hard for it." He was right. My dick twitched and thickened against his palm no matter how much I hated it. He pulled his fingers out and I heard his zipper. Then the fat head of his cock pressed against my hole.
He didn't ease in.

He slammed forward in one hard thrust. I yelled, the pain sharp and deep as his thick cock forced its way into my ass. He gripped my hips and started pounding, balls slapping against me with every stroke. "Tight straight boy pussy," he grunted. "Taking it like a whore already." I tried to fight, but every thrust hit something inside that made my cock leak. Pre-cum dripped from my dick onto the concrete.
He fucked me hard and fast, no mercy. His cock stretched my ass wide, the burn turning into a weird heat that spread through my gut. I hated how my body responded. My hole clenched around him, milking his shaft even as I begged him to stop. He reached under me and jerked my cock in time with his thrusts. "Cum for me, bitch," he ordered. I didn't want to, but my balls tightened and I shot ropes of cum onto the floor while he kept drilling my ass.
He didn't stop after I came. He flipped me onto my back on a stack of pallets, legs spread wide. His cock was still rock hard, shiny with spit and my ass juices. He pushed back in, deeper this way, and started grinding slow and nasty. "Look at you," he said, staring down at my face. "Straight guy getting his hole wrecked and loving it." He leaned in and kissed me rough, tongue forcing its way into my mouth while he fucked me. I tried to turn away but he held my head.
His thrusts got faster again. He grabbed my softening cock and worked it back to full hardness. "You're gonna cum again," he promised. And I did, shooting another load across my own stomach while his cock pounded my prostate. The orgasm made my ass squeeze him tight. He groaned, buried himself balls-deep, and flooded my hole with hot cum. I felt every pulse as he filled me up.
He pulled out and watched his load leak from my stretched hole. Then he made me suck him clean, shoving his softening cock into my mouth. "Taste your ass on it," he ordered. I gagged but licked him anyway, the mix of cum and sweat thick on my tongue. By the time he was done, my jaw ached and my ass throbbed.
He left me there, jeans around my ankles, cum dripping down my thighs. I should have felt nothing but rage. Instead my cock twitched again at the memory of being taken so rough. I knew I'd be back in that alley soon, hoping he'd find me again.