While Hogwarts' main priority is to educate children in the ways of witchcraft and wizardry, basic learning was mostly seen as an afterthought. Most common-place lessons found in muggle middle-school were taught to young witches and wizards much later in life. Your average witch knew how to summon lightning bolts from the sky better than is you asked them to perform long division. It was a wonder how they maintained a society at all given how much common-sense was in short supply. It was 1 in the afternoon when everyone finally arrived for the Female-centric Health Class. For many, it was their 8th year and only now were they about to be given a detailed lesson on sex education.
Usually, this class would be sectioned off for individual houses, but the school staff believed it would be best if as many students were present as possible. The assigned professor, Nymphadora Tonks, waltzed to the front of the classroom looking chipper as ever. Being a shape changer, she frequently altered her appearance to suit her fancy, making it impossible to pin down her exact age on sight. Right now, she looked to be 21 years old, which was a far cry for anyone who knew better. However, today was carefully planned out. She would take on the role of 'Mother Hen' to these inexperienced witches. Old enough to be their guide while also young enough to be resemble a big sister for what's to come.
"Girls," she greeted informally, "We're going to be doing things a little differently this class. Some of you may not be aware, but today is the sex-ed seminar." A low rumble of chatter came from the uninformed students, many of them afraid of what they were about to hear. Sure, all of them knew what sex was meant for, but many still lacked basic knowledge of how it was performed, too embarrassed to ask others for guidance.
"At this point," continued Tonks, "Any other teacher would have you refer to your textbooks; clinical drawings and all that. But you lucky gals ain't in the hands of some dried-up old ninny. You're in Auntie Tonks' house now, and she knows how to give y'all witches a show."
She snapped her fingers and smoke erupted from the fireplace behind her. The man who stepped out of the smoke was Harry Friggin' Potter, 19 years old, a full year older than anyone there. Every girl in the class recognized him immediately, left wondering what the heck he was doing here in a gender-specific seminar.
Their teacher gestured to the new arrival, "Mr. Potter will be my assistant and male participant."
Hermione's hand shot up, "Um..Participant?", she asked hesitantly.
"You got it," finger-gunned Tonks, "Why tell you what goes on downstairs when I can show it? Today's class will be a live demonstration!" All the girls were alarmed, she can't possibly be saying that she was going to do it in front of the whole class, that would be absurd.
Tonks pointed to the door, "If anyone still has reservations about learning the human reproductive system, you may wait outside." She was impressed to see that, despite the initial apprehension, not one student exited their chair.
The lady professor gripped her wand, "Good, let's begin." She swished and flicked it at her clothes, making them dissolve before the students' eyes. Their "big sister" was completely nude and smokin' hot, exhibiting her plump breasts and perfect skin to her peers. Her pink hair only emphasized her otherworldly beauty. Harry simply stood off to the side waiting for his cue.
"Now, this is still an educational lesson, so I will need all of you to pay close attention," instructed Tonks. She lowered her hand to her pristine, hairless vagina and tenderly cupping her groin. "This is called a vagina," she continued, "Inside the vagina are little nerve endings meant to facilitate pleasure." Leaning back on her desk, Tonks took two of her fingers and began plunging them into her pussy.
"As you can see," she explained, "My body is already reacting to the stimulation." The students watched as Tonks directed their attention to her nipples, witnessing them grow stiff and hard. "This is the ideal state of arousal for sexual intercourse," Tonks educated, "If you would draw your gaze back down to my vagina, you will notice I am starting to leak fluid." Forcefully prodding her pussy, she continued, "Before you is a female's natural lubrication. The body instinctively releases this whenever a woman is sexually aroused. Sometimes via seeing a viable partner or perhaps if the woman is getting ready to have an orgasm. Now if you'll excuse me, I think I'll ride this wave to completion."
Tonks went to town on her box, whimpers and moans escaping her mouth. Her body arcing forward while goosebumps trailed down her skin. She chanted, "I'm gonna cum, I'm gonna cum," uncaring that she was spoiling herself in front of her own students. Her body spasmed and twitched before convulsing with a hardy groan. Many of the witches were furiously scrubbing notes down, trying to intake every bit of information that they could. Tonks slowed down and unsheathed her fingers from her constricting pussy.
She continued, a little out of breath, "Alright, so that is the basic orgasm of a female. Now enters Harry." The pink haired professor flicked her wand towards the man, casting a spell which slowly dissolved his clothes. The girls braced themselves, having never seen a naked boy in the flesh before.
"This is an example of a virile male," Tonks walked over to Harry, feeling his body all over, "Notice the broad shoulders, defined abdominal structure, and most importantly, the incredibly pronounced phallus." One of the witches in the back fainted at the sight of Harry's impressive penis.
Despite still being flaccid, he was quite long for a man his age. "What you see now is the normal state of a male whenever they are in civilized circumstances," Tonks said as she steered Harry to the front of the class, "The male's phallus, or "cock" as it is colloquially known, will remain in this state until stimulation is provided. This can be accomplished via sight, sound, or touch."
Tonks began to gently stroke Harry's cock, blowing hot air into his ear. Before everyone's eyes, the slumbering phallus began to rise and engorge. It stood proudly as a testament to the Chosen One for whom it belonged to. A few more witches lost consciousness, their poor virgin eyes unable to withstand the sight of such a handsome specimen. Hermione had been friends with Harry for as long as she could remember and even she didn't know that he was packing that monster in his pants all along.
"When the penis is like this, it's called an erection," informed Tonks, "This is the state of a male when he is ready to mate. The means in which he would successfully breed a child are located in these organs underneath."
The professor's wand pointed to Harry's shaven balls, quite ironic for a guy named Harry to be hairless down there. "These are known as the testicles," educated Tonks, "As impressive as his phallus is, this is where the real magic happens. Inside this sack, the male's body produces little tiny tadpole-looking creatures called sperm. They wiggle and squiggle and swim all over the place with only one goal in mind, making babies."
Students turned to each other with concern, suddenly afraid of somehow getting pregnant themselves just by being near Harry. She calmed them down, "No no no, you can't get pregnant on contact, that only happens in unique and specific circumstances, as I will show you."
Tonks took her hand and continued stoking Harry's cock. Harry became titillated by the stimulation from Tonks' digits gently playing with his organ. A dew of fluid began to leak from the tip of his cock and drip onto the floor. "That is pre-cum," explained Tonks, "It is the tell-tale sign that a man is ready to ejaculate."
One hand belonging to Cho Chang raised in the air, "What does 'ejaculate' mean?"
"Marvelous question," praised Tonks, "Ejaculation is the term given to when a male psychically expels semen from his body. Semen is a goopy white substance that is teaming with a male's sperm that gets formed in the testicles." Her lecturing grew in intensity along with the speed of her hand, "Right now, the pleasure that a male receives is sending signals down to his balls to start preparing semen for ejaculation. And if I'm not mistaken, Harry's ready to ejaculate himself. Stand back girls, there's no telling where it'll land."
Indeed, throughout her lecture, Harry was concentrated on cumming. His job was to be the male subject, the one thing he needed to do was cum on command. Believe it or not, it actually took more effort to cum this early than if he was having sex normally. He had to let go of all his inhibitions and will his stamina to be weaker. Harry's new, weaker state easily let Tonks take him away. His penis twitched and sputtered before violently shooting his nut outward. The girls screamed as a horrid mass of disgusting white matter flew through the air.
Unfortunately, it seemed Tonk's jerking directed Harry's cock a little to the left, making his cum hit a student right in the face. The unfortunate student in question was Daphne Greengrass, her face covered in male essence. Unbeknownst to everyone, however, that trajectory was actually no mere accident. Hermione quickly hid her wand from sight, sadistically giddy that she got on over on her academic rival. Looking over, she saw that one student was starring directly at Hermione, having saw the whole thing. Fortunately, that student happened to be Luna Lovegood, who only gave a nod and a "thumbs up" in response.
"Whoops, sorry about that, Greengrass," shrugged Tonks, "You never truly forget your first bukkake." She flicked her wand to clean up the mess as if it never happened, wiping away everything but Daphne's shame. Some of the girls couldn't help but giggle at Greengrass' misfortune.
"Now if we can all simmer down," Tonks tried to reign the class in, "There is one more step we must discuss. You've seen what it's like when a woman cums, you've seen what it looks like when a man cums, now we put them together and see what happens when a man and a woman decide to fuuuuuuuck."
The professor cast a spell and made a lavish bed appear in the air before descending between the aisles. Tonks wanted everyone to be as close as possible for this next part, deliberately positioned the bed in the dead center of the desk arrangements. She strutted past the students and crawled onto the bed before rolling onto her back and spreading eagle. The pinkette cued Harry to join her, his dick swinging like a menacing pendulum as he got closer. He got on his knees and lowered his face to her vagina, only for Tonks to stop him.
"Uh uh, I'm afraid that is a lesson for another day," she foreshadowed, "Right now, the only thing we need concern ourselves with is missionary." Harry's spent penis arouse back to life, eager to explore the depths of this gorgeous woman. The wizard directly his tip into her folds, not penetrating just yet, and climbed on all fours to face Tonks herself. He hovered above her body at arms length, ready to pounce. She caressed his face and turned to the class, "Pay attention ladies, this is how a real man fucks a woman."
Harry arced his body backward and rammed his penis all the way into Tonks. Gasps echoed through the classroom, the girls lay speechless at seeing their professor like this. Tonks was in ecstasy, the feeling of fullness sent shivers down her body. "Oh Harry, you're so big. It's hard to believe you DON'T HAVE A GIRLFRIEND YET," she directed to anyone who would catch on.
They man slowly began easing backward before ramming his entire length back in again. Each thrust made Tonks gasp for air, he truly was a wizard unlike any other. "As you can see," she instructed between whimpers, "The male thrusts his phallus inside the woman's vagina in rapid succession. This allows both the male and the female to experience sexual stimulation at the same time. The congregating pair are meant to continue this act until they climax together."
One eager hand just had to ask question, "But if he climaxes, won't that make a mess?"
"Are you referring to his ejaculate?", Tonks dutifully rewarded her student for paying attention.
"Yes," the student continued, "Won't that be more trouble then it's worth?" An idea popped in the student's head almost as soon as she spoke. She gasped, "You don't mean…"
Tonks chuckled, "And now we come to true purpose behind sex. Yes, all this time, this male has been prepping himself to ejaculate inside me and inseminate me with his children."
Concern came over every student. One stood up and shouted, "DON'T DO IT PROFESSOR! You don't have to go this far!"
"But I must, children," she insisted, "I must. I am a teacher, my job is to educate you on everything there is to know, even if I have to do it myself to show you." She moaned, "If you care about your professor, then you'll watch every last second. Don't turn away no matter what, this is for your benefit. I'm doing this..because I..am your teacher."
All the students stood at attention like an army battalion, "YES MISS TONKS," they shouted with pride.
"Very good," she nodded, "Now, we move into the advanced part of the seminar. If you look inside your desks, you will see an assigned pair of spectacles."
The students opened the cubby of their desks to find an odd-looking pair of goggles with multiple apertures. "Please put them on and adjust the rims 90° to the right," Tonks instructed.
They all did what she asked and watched the lens of the goggles change. Like an X-Ray, they began to see the inside of their professor's vagina, along with a clear view of Harry's cock lunging back and forth inside.
"Please direct your attention to the back of my vagina," she pointed to her stomach, "Past the initial tunnel, there lies a liver-like organ called the womb. Attached to the womb are two tiny organs which resemble little beans. Would you all please adjust the second rim of your spectacles so you may zoom in closer."
The students followed instruction, turning a second, inner-most rim clockwise, their view of the "beans" enlarging to fill their lens. Tonks took her wand and cast another spell pointed at her gut, "Fertilus Ovalai!"
A second latter, Tonks felt an uncomfortable pinch in her abdomen before it released. The students watched as a little tiny bud was produced from the bean. "This process is called ovulation," she explained, "Normally this would take many weeks, but for the sake of this class, I've sped up the process. Now turn your zoom lens back to starting position."
They did that.
"I'm afraid Harry may have already spent his load on poor Daphne's face, so I might need to fix something," said Tonks, pointing her wand at Harry's nuts. Before long, Harry felt his testicles swell and expand larger than before. From the students' perspective, they watched his swinging balls grow to the size of apples, tightly packed and very firm.
"There, now there's no possibility than I'm not getting knocked-up with this," Tonks smirked, "Alright Harry, it's about time you released your seed. Pay attention girls cause you're only gonna get the chance to see this once."
Harry increased the pace of his thrusts, causing Tonks to squeal like an animal in heat. The students strangely felt like they were apart of the act, being so close to the action. One of them was so caught up in the moment, they grabbed the professor's hand, squeezing it like a stress ball. Harry made sure to hold off until just the right moment, waiting for Tonks to be at her tightest, and then…
"AwWwWwWwWwwww," she belted out. At the same time, Harry Potter violently nutted inside Nymphadora Tonks, making sure none of it had a chance to escape. All of the other girls could see Harry's cock launching rope after rope of semen inside their professor through their X-Ray goggles. They saw their professor in the thralls of afterglow, incredibly pleased with herself.
She caught her breath, "At this point, the male's job is done." Harry rolled off of Tonks and left the bed, casually walking to the front of the room. Whisking a finger inside her pussy, she continued, "Unfortunately, insemination is not complete just yet."
Tonks gathered a dollop of Harry's cum before gulping it down, "Delicious. Now, if you'll turn your goggle rims clockwise yet again.." But the students were already on it, having predicted this routine. "A bunch of eager beavers I see," she snarked, "But I'm afraid you'll have to zoom in even closer this time. What we're trying to see is microscopic."
The students followed her instruction. One student found what they were looking for and freaked out. Tonks turned to her, "Oh, I guess you found them. Yes, what you see before you are Harry's little swimmers."
Focusing in, the other students in turn saw a swarm of tadpoles swimming in a straight line towards the back of their teacher's vagina. "If you will recall earlier, my ovulation had produced something," she continued, "That is called an egg. It was created by my ovaries for the sole purpose of being fertilized. Again, this process takes up to a day so we're going to just speed things up." Tonks waved her wand, causing the sperm to rapidly increase speed, gaining on her cervix before wiggling through.
They were inside the womb and fast approaching the egg. "Now, each little one of these guys wants that egg, but only one of them is going to get it," she explained, "Sometimes it's determined by speed or strength, but more often than not, it's just pure luck who gets there first."
The sperm quickly surrounded and bombarded the egg with their heads. "Professor," one of the students cried, "You have to do something or else they'll make it through."
"Of course they will, darling," Tonks reassured, "I want them to finish their goal. This is the miracle of life, it's glorious and wonderful. Mostly messy, but very beautiful." She crossed her arms, "I have chosen to let Harry inseminate me, and if I'm not mistaken, one lucky winner is worming it's way in now."
The students looked down at the carnage to see a single sperm force it's way through and successfully infiltrate the egg. Their professor was officially pregnant.
"And that will be all for today," said Tonks, jumping off the bed and making it disappear. All of their goggles poofed into smoke. Harry and her clothes magically reappeared on their bodies as if no ball-slapping sex had ever happened between them.
She continued, "We shall continue our lesson next week, please read the assigned chapters 4 and 5."
"But what about you?", one of the students stood up.
"What about me?", she responded.
"You're pregnant!", blurted out the student.
"Well no dah," Tonks responded, "You just watched it happen."
"But…aren't you worried about being a mother?", pressed another.
Tonks took a deep sigh and walked to the student's side, "I appreciate your care, but I'm afraid that's none of your concern. I am your teacher, and I will do whatever it takes to make sure you all learn. Class dismissed."
The students awkwardly exited the room, still troubled about the state of their teacher. But if she says it's fine, they figured there was nothing they could do about it. As they left, Tonks called out, "If you have any other questions, don't be afraid to see me after class."
Hermione had some lingering questions of her own that she would see to very soon.