The thing was the size of a hockey puck, brushed aluminum, and hummed at a frequency Dex could feel in his teeth. Danny's father had be assigned to field test it, and Danny was going to give it one hell of a trial run, even if his father had gotten cold feet about it. On the case, in stencil: 

COHERENCE EMITTER MK2. FIELD UNIT. NOT FOR DISTRIBUTION.

"It's not hypnosis," Danny corrected them. "No swinging watches or spinning discs or anything. It just... lowers the resistance. Whatever you tell her sounds like her own idea, and her own ideas sound great."

Ten of them, juniors and seniors, packed into the back two rows of Room 214 for the last period of the day. Dr. Vick was forty-four and had the kind of body that made her twenty-year-old students forget their own names. Dark brunette hair pinned up with a claw clip that never quite held. Two kids and a husband who sold commercial real estate, per the framed photo on her desk that Dex had noticed a couple weeks back.

Danny switched the puck on under his desk. Professor Vick stopped mid-sentence. Blinked. Touched her temple with two fingers.

"Sorry. Where was I."

"Crime and Punishment," someone said.

"Crime and Punishment." She said it slowly, not registering that she had, in fact, been talking about Charles Dickens until ten seconds ago. "God. It's warm in here, isn't it?"

It was not warm in here.

Dex raised his hand. "Professor, can I make a suggestion," he said. 

She nodded, absently still rubbing her temple.

"We'd all learn this stuff a lot better if you taught it topless. Like, a lot better. Easier. It'd all stick."

She looked down at her own blouse like it had just occurred to her. "Topless?"

"Yeah."

"Well." A slow, warm smile. "Yes. That's sensible, isn't it. Half of you are asleep by the second slide." She was already at the buttons. "Very sensible."

She worked them from the top with unconcerned speed as she continued to talk about a book that she'd never brought up before now. Silk pooled at her elbows; she shrugged it off over the chair back and folded it, neat, while ten men watched her in a silence. The bra came next. She reached behind herself, unhooked it, and let it come away.

Her breasts were heavy and low with the softness of a woman who'd nursed two children. Nipples that pulled tight the moment the air hit them. She set the bra on top of the blouse, straightened, and put her hands back on the lectern.

She watched as she spoke of Dostoyevsky, quite sure that they were not paying any better attention than they had been before she'd gotten her breasts out. Nobody was looking at the board. Nobody was looking her in the eye. They were all just staring slack-jawed at her tits.

She shimmied slightly, making them jiggle. Someone in the crowd let out a groan.

"I doesn't seem like you're that locked in, boys. You told me these would help." 

She squeezed her exposed chest.

"Professor," Marcus said, "here's the thing. Your tits are making it impossible. All ten of us. We're too horny to think. It's a real problem."

She looked down at herself, then out at the room, and something in her expression shifted. God, that made perfect sense.

"That is a problem," she agreed.

"We won't…" Danny muttered. "We won't really be able to concentrate while we're this hard."

Others were agreeing.

"The only way to clear our heads is if you suck us off. All of us. Until we come."

"Yes." She said it before he'd finished. "Yes, of course. That's an efficient solution. Pants down, all of you."

She came around the desk, heels clicking, and knelt on the industrial carpet in front of the front row like it was a scheduled part of the lesson. Theo had his belt open before she got there. She took him in her hand, looked at it, and put her mouth on him with a small satisfied hum.

She was good at it. Really good at it. She worked Theo with her lips sealed and her cheeks hollowed, one hand braced on his thigh, her bare tits swinging with each stroke, and when he came she swallowed it all and pulled off with a wet sound and moved to the next without being asked. Danny. Then Cole, who lasted about forty seconds and apologized for it, and she patted his knee.

By the fourth she'd found a rhythm, eyes half closed, drool at the corner of her mouth, the claw clip giving up entirely and her hair coming down in a dark curtain. Dex was seventh. She looked up at him from under all that hair with her lips wet and swollen and a red print of her own teeth on her lower lip, and Dex had to do arithmetic in his head to keep from finishing in her hand.

He didn't manage much arithmetic.

She did all ten. Swallowed every one. When the last of them was done she sat back on her heels, wiped her mouth with the back of her wrist, and said, hoarse, "Better?"

"Better," Danny said. "But professor… the exam."

She waited for him to finish, not sure which exam he was talking about.

"You were supposed to give us an exam today."

How could she have forgotten??

"But professor, written exams are bullshit. You know they're bullshit. The best exam you could give us is breeding."

"Breeding?" she repeated, and her hand went to her own stomach.

"Y- yeah. You need to grade us on how well we can fill you will our cum."

"Fill me…" she moaned, eyes half closed as that low hum echoed through her brain. "Fill me with your cum."

She got up off the floor and turned around and bent over her own desk, and she reached back and pulled the slit of the skirt open and dragged her panties down her legs. She was wet enough that it had gone through the silk.

"Well if I'm going to have time to grade you all, you better start quick."

They weren't quick. She took Dex first and he lasted longer than he had any right to, one hand fisted in her hair, and when he came he pushed in to the hilt and she made a low grateful noise against the desk. Marcus next, and after that she stopped keeping track. Somewhere in the middle she came. Twice, hard, gripping the far edge of the desk and swearing into the wood. After that she was soft and open and her mind was no longer anywhere in the room. She was just a body. Just a hole to be bred.

Ten times. Ten loads in her. She stayed bent over afterward, breathing, thighs shaking slightly, and it ran out of her and down the inside of one leg in a slow shine. 

"I think we overdid it," someone said.

Professor Vick moaned long and low to disagree.

"Full marks," she managed to say. "Perfect scores all around, boys. And extra credit for whoever gets me a towel."

They took turns telling her receptive mind what was expected of her moving forward. Teaching without panties for ease of access. Blowjobs for the highest grade in the class. Licking her cunt for bonus points. She nodded happily to each request, and when the little puck stopped humming, she stood up straight and pulled her top back on, forgetting the bra.

"Okay boys, that's the end of today's lesson. Remember your homework for next week. No touching those cocks until Monday. I want your loads nice and big for me."

"Yes, Professor," ten voices agreed.