Chapter 14: Certification
"No," said Su.
She and Harry were in the library, sitting either side of one of the many tables provided for studying. Only a few overeager Ravenclaws were there this early in the year, providing the two plenty of space for Harry to explain his brilliant new idea.
"I thought you wanted to pay me back," Harry said.
"I did. I do. But Harry, I want you to say that again, slowly this time, and see if it makes any sense even to you."
"I want to start tutoring…"
"Uh huh."
"...helping my fellow students with confusing topics they may not understand…"
"Right."
"...like sex."
Su's head thudded into the table. The librarian, Madam Pince, looked over angrily, before spotting Ravenclaw robes and deciding to let it drop.
"And how are you planning to help them with that?" Su asked, her voice muffled by the firm wood beneath her face.
"By sleeping with them of course!"
"Of course," Su mumbled.
"Repeatedly," Harry added. "Over and over. With youthful frequency. Can't expect to improve if you don't keep practicing, after all."
Su lifted her head, strands of hair falling across it at odd ankles from her forehead's downward slam.
"Do you honestly think the professors are going to sign off on this?"
Harry blinked. "Do they have to?"
"If you don't want to get shut down with an extra helping of detention to go with it, then yes. All tutors have to be cleared by the professor of the subjects they want to teach. It would be a nightmare otherwise, if students started running around sharing bad information and undoing months of lectures behind their backs."
"The more you know. So if I get a professor to sign off on it, I'm good to go?"
"Yes. Technically. But before you even go to a professor, you need at least three students interested in hiring you. If you can get those—"
"Be right back."
Harry abdicated his seat so fast, the chair was left rattling back and forth between two of its legs. Su stared after him as his back sped away and disappeared out the door. Then she sighed, collecting a book from her bag and cracking it open, joining her fellow Ravenclaws around the room in getting a little bit of early-term studying in.
She almost finished a single chapter before a voice said, "I'm back."
Su jumped, not having expected anyone to bother her for at least an hour. Yet fifteen minutes after fleeing the room, Harry was standing in front of her, a girl on either side of him.
Harry looked proud, patting the backs of Susan Bones and Lavender brown. Su couldn't help but stare at the girls.
"You both want him to tutor you?" she asked.
They nodded.
"No, I mean— you know what he's talking about tutoring you in, don't you?"
"Making love," Susan said at the same time that Lavender said, "Pounding our pussies."
They promptly stopped to give each other slightly odd looks, but Harry just beamed.
"So," he asked Su, "how do I go about getting a professor's permission."
"Just set up a meeting with one. But Harry, I said you needed three students for that."
"I have three," he said.
Su frowned. Her eyes slid off of him, glancing first at Lavender, then at Susan. As the best Arithmancy student at the school, she was pretty sure she could count… to… three…
Slowly, her eyes slid directly down, looking at herself. Harry waggled his eyebrows.
"Fine," Su sighed.
O-O-O
"Thanks for agreeing to this, Professor," Harry said. "It means a lot. Obviously, Hogwarts doesn't actually have a position for what I'm trying to teach… Not even for Sex Ed, which is awfully shortsighted if you ask me… But it put me in a bit of a bind, so I'm really grateful to you for helping us out."
Professor Sinistra watched them perfectly silently. After a long moment, she gave a stoic nod.
The dark-skinned witch was the beauty of the Hogwarts faculty, as attractive as she was strict in class. At the moment, Harry stood with the three girls arrayed behind him in Sinistra's private quarters, which turned out to be a room most of the way up the Astronomy Tower. The woman was certainly passionate about her subject. Other than her bed and the wooden chair she currently sat in, observing them, the room was cluttered with telescopes and nearly nothing else.
"So, should we just get started, or…" Harry said.
Sinistra raised one eyebrow. Overcome by a bit of awe at the sheer suaveness of her character, Harry nodded, jumping into the demonstration.
The first step? Shedding his robes in one quick move, leaving himself stark naked.
Four sets of eyes was a lot to have on his naked body, but Harry had nothing to feel ashamed of, so he sucked in a breath and let them look. It was nothing new to (three of) them, after all.
His body was muscular without being bulky like a Beater's, with most of the definition focused around his core and the best parts of his arms. His cock was mostly flaccid, but that was about to change. With varying degrees of eagerness, the three girls he brought with him moved around to his front and kneeled down.
They pulled off their tops, revealing they hadn't worn bras underneath at all. Just like Harry, they saw it as a waste of time; all of them knew what they were here to do. Susan ended up on the left, Su in the middle, and Lavender on the right.
With their shirts out of the way, Su couldn't help but look left and right.
"I resent the composition of this line-up," she said, crossing her arms under her perky breasts.
Lavender grabbed the back of her head, pushing her forward into Harry's crotch. Su grunted, but recovered quickly. Harry had been growing hard at the sight of three topless beauties, but as Su began using her mouth on his hardening length, the speed of the process increased exponentially. He groaned, his head tilting up, as a succession of licks and kisses brought him straight to full-mast.
As soon as he was hard Susan jumped forward, replacing Su. The redhead had been a complete novice very recently, and it showed as she dove into an awfully clumsy blowjob. Harry tried not to wince as her teeth grazed him, focusing instead on the sensation of her enormous tits pressing into his thighs.
"As you can see, they still have some things to learn," he said to Sinistra, holding eye-contact with the stoic professor over the tops of the girls' heads. "But it's not their skills we're trying to display. It's mine."
He paused, allowing Susan a few more moments of her excitable slurping, before gesturing for Lavender to take over. His housemate did so in an instant, deepthroating him immediately with even more enthusiasm than she had on the Hogwarts Express. It seemed that someone had a performance kink.
Susan pouted, crossing her arms as she watched Lavender outdo her, but Harry patted her head.
"Don't worry," he said, a very slight tremor to his voice as Lavender sucked him more fiercely than a Dementor. "After we pass, I'll have you going at it like this in no time."
Susan brightened. "You mean it?"
"This is so weird," Su muttered.
But as Lavender pulled her puckered lips off Harry's head and caught her breath, Su wasted no time in jumping in, shoving him down her own throat. Harry grunted, moving his feet slightly to keep his balance.
"As you can see, Professor, Lavender here is capable of an absolutely exemplary blowjob with that dirty little mouth of hers—"
Lavender giggled, shielding her smeared lipstick with a hand. "You're making me blush, Harry!"
"—yet here I still stand, refusing to give in. You have my heartfelt promise, I will not cut short a single lesson with any student because of performance issues. When it comes to stamina, I've got as much in the bedroom as on the Quidditch Pitch."
He rounded off his speech with a charming smile that bared half his teeth. Professor Sinistra continued to watch in silence, while Su actually pulled her head off his cock to glower at him.
"That was so corny."
Harry grabbed the back of her head with both hands, plunging her down his shaft as if trying to administer another batch of Amortentia antidote.
"Of course, stamina cannot be all that I offer," Harry said. "Otherwise, I'd be more of a dildo than an educator! As you can see, I am more than capable of taking command when the need arises. But it's not just that— I can tell after just one sexual encounter what the best approach to take with a student will be."
He looked down toward where a succession of guttural coughs were echoing out of Su's throat. Her hair flew as her head was jerked smoothly through the motions. Her lipstick had already become a casualty of the blowjob, smeared lengthwise along the veins of his member.
"Though this looks extreme, I promise you, it's the correct approach," he said, looking back up at Sinistra. "Girls?"
Lavender and Susan crawled over, sliding Su's robes the rest of the way off her petite body. Su had gone up on her knees to accommodate the rough work her head was being put through, and now, Susan and Lavender reached around, exposing her entrance to the room with prying fingers.
Lavender gasped. "He's right! She's sopping!"
"Super, super wet," Susan agreed timidly, glancing at Su's bulging eyes.
"My kink-guessing abilities currently have a one-hundred-percent success rate," Harry said proudly. "When it comes to customer satisfaction, no one else offers what I can."
He mashed Su's face flat against him while giving his hips a small side-to-side wiggle, rubbing his cock through her gullet. A shiver hit her body, starting around the neck and traveling down to her toes. Moaning into his body, she sprayed a short but fierce orgasm on the floor. Harry released her, and she slid back, pulling off of him and sitting there on her knees looking dazed.
Harry winced briefly, before forcing it into a smile.
"Of course, even the most talented of tutors have their limits," he said. "Sometimes, recognizing the valiant efforts of pupils and offering proper praise is the most important part."
The excuse had just barely left his lips when strings of cum fired out of his cock, which had been pushed too far. He turned as he came, making sure to share the load evenly between the three girls. Susan and Lavender both pushed up their breasts, collecting the gift on their cleavages. Lavender immediately started licking up every drop, and after seeing what she was doing, Susan copied her, although it took her twice along and she ended up smearing half the cum across her puffy cheeks. Su simply sat there, catching her breath, and allowed the warm drops to land directly over her face.
"As important as delaying an orgasm is, that's only one part of stamina," Harry said sagely, addressing Sinistra once more. "As you can see, despite having just offered my students more than adequate praise, I am still completely hard."
He gave his cock a short smack, letting it bob and bounce around wildly, demonstrating its stiffness. Susan, Lavender, and even Su tracked it with their eyes through every bounce and bob.
"What do you think, Professor?" Harry asked. "Have I convinced you yet?"
There was no answer. Sinistra had not moved in minutes. Harry stared into her dark brown eyes and felt pinned there by their intensity, as if he were some distant star trapped at the opposite end of her telescope. He wasn't ashamed to admit this— his heartbeat actually sped up. He wondered, for the very first time, if maybe Sinistra had been a pick too familiar with sex, because even his best efforts hadn't even been enough to make her flinch—
As doubt crept in, someone grabbed his hand. Susan pulled him onto the floor, where he landed with a brief grunt. She climbed on top, swinging her wide hip across him.
"Sit still Baby," she said, looking at him from under half-lidded eyes. "Let me show her the work you've already done."
Harry's eyes widened as Susan dropped down, enveloping his hard length in her tight, moist, and extremely wet insides. Her sensations snapped him out of his fear-induced reverie just in time to twist, addressing Sinistra from the floor.
"Off the books, purely recreationally, I've done a bit of work with Ms. Bones," he said hurriedly. "Just recently, she had never done anything of this sort, yet as you can see, now, Ms. Bones is—"
Susan twisted him around, burying his face between her breasts.
"Don't call me Ms. Bones," Susan said huskily. "That's my no-fun, never-ending dry-spell Aunt. I'm not like that! I've got your thick cock to see to all my needs."
She was getting remarkably good at bouncing her hips remarkably quickly. Or maybe Harry was just too deep in her breasts to think clearly, so anything felt like perfect form. He allowed himself to shut his eyes, remaining buried in her breasts, but his hands reached around, latching onto her hips.
Susan wasn't nearly as small as Su, but she was still light enough for him to lift. She yelped as she felt his hands take the brunt of her weight, only to drop her back down right after. Carefully, Harry pushed her toward even better movements, teaching her in real time the best ways to milk his cock.
Although maybe that wasn't all what he was showing her was good for, because it was Susan who hit her limit first. She moaned loudly, hugging his head into her bust, holding him there so tightly that air escaped him, somewhat similar to what he had done to Su moments before. But Susan trembled inside, her fleshy walls tightening around his cock. The next time she rose up and dropped down, as their skin collided with a loud crack, she hurled her head back and warbled out her loudest cry yet, cumming hard across his cock.
Her arms weakened from around his head, and her weight pitched back as she slid off of him. But When Harry slid out from under her, his glistening length was just as hard as it'd been when she climbed on.
"Even while under pressure, I can still educate!" Harry said. "Ms. Bones… Susan, I mean, might have taken the initiative, but I still ensured that she found a way to improve through the experience. Look at this face. Do you see any regrets?"
Sinistra's eyes slid off of him, taking in Susan where she lay sideways, giggling to herself with mostly-closed eyes. Her huge breasts were pooled against the floor, while she was leaking her tangible 'lack of regrets' across Sinistra's floor.
Eager to continue the demonstration, Harry turned to Lavender. The blond grinned at him, attempting to appear nonchalant… but the way her thighs were glued together belied her true excitement.
She gave him an enticing smirk, then sat still waiting for him. Harry pounced on her.
Lavender giggled while his weight came down on top of her. Even as his hands still kneaded the blond into position, Harry was looking back up at Sinistra.
"While teaching under adversity is important, the true measure of any educator is how they can instill lessons in ideal conditions," he said. "If you have any doubts about my ability to perform while in control… Let me alleviate them for you."
With a firm hold on Lavender's ankles, he pinned them against the floor on either side of her body. The position made her breasts pop out to nearly the same proportions Susan's sat at naturally. Lavender gasped as she felt her body flex, then gasped a second time as Harry's length was promptly inserted in her.
"Oh, please Harry!" Lavender wailed. "I need this!"
"Do you mean my dick, Ms. Brown?" he asked.
"Yes—! I mean, no. I need your instruction. It's been so long since I stopped improving!"
Her voice bounced in pitch as his firm thrusts shook her whole body, her chest jiggling like jello.
"And what seems to be the problem?" Harry asked.
"No matter how much I practice, I don't get any better!" Lavender wailed. "I just can't improve in bed!"
"Ms. Brown, that's because you aren't getting the right sort of practice," he said. "You need men that can show you new tricks. Men like me."
He let go of one of her legs, allowing it to spring up and return to its natural position below her waist. At the same time, he turned her slightly to the side, pressing the leg he was still holding against her head. Lavender let out an unearthly scream of pleasure.
"I've never been hit in these spots!" she screamed.
Harry nodded, gradually pressing her leg even deeper into the extreme position, bending her body in ways it never had before.
"Flexibility opens up a world of new possibilities," he coached. "With my help, we'll have you bending and twisting like a whole new woman. Not only will you be able to wow any man, the experience will be like night-and-day for you."
Lavender failed to answer coherently, continuing to wail as she contorted deeply, Harry plunging into her from angles she had never experienced. In short order she had cum as hard as the fresh-faced Susan. As Harry pried himself off of her, her leg bobbed up part way, but remained at a strange angle, a sign of the progress she was already making.
"Not only do my lessons help beginners, they can even teach something new to the most experienced of students," he said proudly. "If Lavender Brown can learn something new from me… Who can't?"
"It sounds kind of mean when you put it that way," Su said.
The only one of the girls still fully conscious, she had greatly recovered from her blowjob, though she still had his cum messily dotting her face. That wasn't because she'd forgotten about it, though. She was just kinky that way.
"It only sounds mean because you're judging," Harry said. "I don't judge. That's what's great about me."
Su rolled her eyes, standing and joining him. "Are you sure it isn't your overwhelming modesty and self-admitted good looks?"
Harry grabbed her around the wrist, pulling her closer. Su squeaked and stumbled over, where Harry promptly grabbed her by both arms, holding her there.
"I don't think my ability to teach is in any more doubt," he said to Sinistra. "In my mind, that leaves only one question left. Can I handle disciplinary issues?"
He let go of Su's hands to grab her hips, tossing her into the air, where he promptly caught her. Looping his hands under her knees, he folded her into a position similar to the one Lavender first occupied on the floor, except Su's petite body was being held up completely within his arms. Before she could complain or say a single thing, he'd plowed his cock into her from below.
"The best punishment is one that relates to the lesson," Harry said. "I find that bratty attitudes are most easy to deal with in the bedroom. All they require is a firm hand… or two."
His elbows hooked inside of Su's knees, freeing his hands to squeeze her breasts in a vice grip. He walked forward, still plunging up into Su, her voice warbling from deep in her chest, until they were directly in front of Professor Sinistra.
"Tell me Professor," he said, holding Su's face directly in front of the instructor's. "Do you think she'll be tempted to cause trouble for the rest of the lesson?"
He could only see a faint approximation of Su's expression reflected in Sinistra's dark eyes— her mouth hanging open, her tongue lolling halfway out, while her hair flew around her face, propelled by the powerful thrusts jerking her body.
Professor Sinistra just stared as Su's voice rose in both pitch and volume, filling the room even louder than the brutal collisions of their bodies. Harry fucked her with just as much force as he had while fending off the Nian; like their lives were on the line, in other words. He knew for a fact she could take it.
After three back-to-back performances, Harry hit his limit when Su did. They orgasmed together, Su's walls crushing against him while he filled her crotch with a load just as large as what the girls shared at the start. Harry groaned loudly, Su screamed, and both of them landed on the floor as Harry's legs gave out.
Breathing heavily, Harry couldn't keep a smile off his face as he looked up. "Well, Professor? Have I proven myself?"
But Sinistra was entirely stiff in her seat, staring forward over their heads, still looking at the spot they had been when standing.
"...Professor?"
The dark-skinned witch suddenly slid off her seat sideways, landing on the floor with a slightly ugly thud, out cold.
Harry stared uncomprehendingly, his smile frozen in place.
"She… fainted?"