Dildo and a blowjob....

He grinned this time and pulled me by my hair back to a standing position. I moaned again, unable to help myself. He opened his left desk drawer and extracted a long black dildo with a wide base.

"I'm going to train you to get this inside you, my girl. It probably won't happen today but I have faith in you to take it all with practice. I have some marking to do today with those essays you were worried about getting all wet. You're going to spend the week under my desk with my cock in your mouth, trying to fit this inside you. Do you understand and consent?"

His hand was still twisted in my hair. I felt moisture pooling between my legs. "Yes, I consent."

"Good. There will be no need for you to talk unless I ask you a question. I will expect you to swallow my cum unless you would prefer to take my class with it all over your face, do you understand?"

I nodded and he pushed me onto my knees and backed me under the desk. I was concealed from the classroom door and the seats; you would have to approach the desk from behind to see me. There was a thin piece of foam there for my knees; the good Dr. had planned this carefully. My range of motion was quite limited; I could straighten my head but not my legs.

"Take off your shirt. No bra? Excellent," he said as my heavy, round perky teen breasts sprang free and were almost instantly fondled by my professor.... I felt a tingle go from the tips of my tits down and through my pussy as I watched him prep my black rubber lover to enter my sweet snatch....

The professor squeezed some lube on the dildo and massaged it into the black silicone before handing it to me and wiping the lube from his hands on some tissues. I placed it between my thighs-it was much larger than I'd realized. Even soaking wet I only managed to get the tip inside me although I moaned as it spread my lips and violated my tight cunt...

He then smiled again, more warmly this time. "You'll get it inside you, my little teen whore. You're such a slut, I know you won't rest until you get it all the way inside you."

"Please Dr. Pleassseeee," I said, trying to sound suitably submissive. "What if I can't get it in? What about my grades?"

"My sweet little slut, your mouth is for me and the dildo is for you. I'll be impressed if you get it inside you but spending ten hours on your knees with my cock in your throat is all that I really care about."

He unbuckled his belt and unzipped his fly. His cock sprang loose, hard and wide. He sat in his rolling chair and rolled towards me until his cock head aligned with my mouth. He pushed into my mouth and I tasted his skin, warm and slightly tangy with sweat. His large body blocked me completely from sight and I had the pleasing sense of safety and peace from being encased in this way, where my only job was to give pleasure and obey.

He rested a hand on my head, entwining his fingers in my thick brown hair. "Good girl. Your mouth is so soft, just like the rest of you." His words were muffled through the wood of his desk. "Don't be too goal oriented. I'll tell you when I'm close and then you can bob on my cock like I know you want to but until then, get used to just having your mouth filled like a good little slut. Your classmates should thank you, their essay grades will be much more generous now."

After a half hour my legs were cramping badly and the professor showed no signs of softening. The phone rang and I pulled away.