Erotica: Anatomy Lessons

“What did you have in mind?” I said stupidly, my cock already semi hard at the idea of fucking this twink. The twink locked the door behind him as he put his books on a desk close to him. He pulled off his shirt, showing off his slender yoga body. I loved the yoga boys, they were always so laid back.
“I think I need some help with the human anatomy?” He said with a smile as he undid his pants.
“I’m sure I could help you out with that,” I said as I undid my belt. “Get to your knees and I’ll show you around the male appendage.”
My student got to his knees and helped me unbutton my dress pants. He pulled down my pants and put his mouth to my, now rock hard, dick through my tighty whiteys. I leaned against a desk as he worked his mouth around my bulge, pulling at the front to expose the head of my cock. He slipped it into his mouth as I moaned. My moaning must have made him super horny because before I knew it I was deep in his mouth, underwear around my knees. I started to skull fuck him as he gagged for more. His hands hurried to my balls, pulling them, massaging them. I felt myself close as he gasped for air.
“Come over here,” I said as I pushed him off me, waddling towards the teachers desk. I threw the papers off and laid down on the desk, my cock floating in the air. The twink crawled on top of me, jerking my cock, pulling my shirt off. He started to bite and suck my left nipple, my cock throbbing in his hand. I heard a rustle on the door, someone was coming in. I looked up, only to see my professor walking in the door. Dumbfounded with this twink on top of me, I was paralyzed.
“I see you’re getting some extra credit. Mind if I help?” He said with a smile.
When we’re together, I feel so weighted from you. You’re simple words mean the world to me. When you speak of her, of them, it hurts my deepest feelings. Why can’t you see what you have in front of you? The thoughts of what you and I could have been, should have been, haunt me in the loneliest of nights. Your skin could be against mine, so soft, but you chose her instead. The feelings I have take over the emotions, the pain of seeing you with her breaks my heart. You stand tall beside me, a giant to even me. I crave the touch of you, just once, maybe twice, or forever.