I walked into Professor Harlan's office after class like I always did, but this time the door clicked shut behind me and I knew it was different. He was 38, built like he still lifted every morning, with a thick beard and arms that stretched his shirt sleeves. I'd been jerking off thinking about him for weeks. He looked up from his desk, eyes dark.
"Lock it," he said.
I did. My cock was already half hard in my jeans.
He stood up slow, came around the desk, and grabbed my shirt. "You've been eye-fucking me all semester.

You want this dick or not?"
"Yeah," I said, voice rough. "I want it."
He shoved me back against the desk, yanked my pants down to my knees, and wrapped his big hand around my cock. "Look at that. Already leaking for your teacher." He stroked me once, hard, then spun me around and bent me over the wood. My chest hit papers. My ass was up.
Harlan spit on his fingers and shoved two straight into my hole. No warm-up, just rough and deep. I grunted. It burned good. He finger-fucked me open while he unzipped behind me. I heard his belt hit the floor and then the heavy slap of his cock against my thigh. Thick, veiny, bigger than I'd imagined.
He pulled his fingers out and pressed the head against my hole. "Beg for it."
"Fuck me, Professor. Shove that cock in me."
He slammed in. One long thrust until his balls pressed against me. I bit my forearm to keep from yelling. He was thick and it stretched me wide. He didn't wait. He started pounding, hips slapping my ass, desk creaking under us. Every thrust knocked the breath out of me.
"Take it," he growled. "Take your teacher's cock like the slut you are."
He grabbed my hips and drilled deeper, changing angles until he nailed my prostate. My cock jerked and drooled onto the floor. He reached under me, fisted my dick, and jerked me in time with his thrusts. Hard, fast, no mercy.
I came first, shooting ropes across the carpet while he kept fucking me through it. My hole clenched around him. He groaned, pulled out, spun me around, and shoved me to my knees. "Open."
I opened my mouth. He fed me his cock, still slick from my ass, and fucked my throat. I gagged but took it. He held my head and unloaded, thick cum flooding my mouth. I swallowed what I could; the rest ran down my chin.
He pulled out, wiped his cock on my lips, then hauled me up and kissed me dirty, tasting himself on my tongue.
"Same time tomorrow," he said, tucking himself away. "And next time I'm breeding that hole."
I left his office with cum on my face, ass sore, and already hard again for round two.