Chapter Text
The boy didn't look like an imbecile, but what he said certainly sounded like that.
"I think I'm allergic to semen, Doctor."
Over his twenty years in practice, twelve of them specialised in urology, Severus had heard his fair share of strange cases, but apparently, there was a first for everything.
"Semen."
"Yes."
"As in, the male ejaculate."
"Yes."
Severus knew of semen allergy, of course, but rare as it was even with women, to his knowledge, it was almost unheard of with men. More a theoretical possibility than a plausible explanation, in any case.
He took a closer look at the boy. Sitting in the chair by Severus' desk like dozens of patients did every week, he didn't appear to be intoxicated or psychotic, nor did he seem like a half-wit. The patient record showed he was twenty-one with no chronic conditions and no regular medication, apart from antihistamines for a pollen allergy as needed. Which was the most likely explanation for the boy's visit. Misinterpreted and confused for something else entirely.
"And what has made you think you might be allergic to… semen?"
Usually, Severus had no trouble keeping his face schooled and his voice even, but something about the boy had already slithered under his skin. With his round, green eyes and slender build, hair mussed and cheeks flushed, he was unreasonably adorable. Not that Severus thought about such things with patients.
Maybe the boy had just had too much sex, and his arse was irritated from all the pounding. Or maybe he was a virgin and had experimented with a carrot. Cross-reactivity with pollen, perhaps?
Instead of blushing like most inexperienced men – and most seasoned men, too – when asked to describe their plight, the boy replied without hesitation.
"My boyfriend, or ex-boyfriend, said my hole turns really red after sex. He said it was disgusting, and the reason he dumped me."
At the last words, the boy's lower lip quivered.
Ah. So, not a virgin, but fucking like a bunny and getting a rash from a jerk boyfriend.
"I see. Have you had similar problems with your previous partners?"
The boy's brow furrowed in concentration. "I'm not sure, but my arse does often feel sore after fucking. Like, sitting feels uncomfortable for a while."
Which could also be the result of poor preparation or rough handling. Or a cock simply too big for such a small body. The boy was markedly shorter than average and thin as a stick.
"Anal penetration can cause a number of complications if not done with caution. Are you familiar with the preparations recommended? Hygiene, lube, and careful stretching?"
This time, the boy did blush. "Well, sometimes… I mean, I know all those things, but sometimes in a hurry it doesn't feel that important, you know?"
So, a normal twenty-one-year-old, basically.
"I can understand the rush, but if you choose to ignore these things, you can expect redness and even pain. In the long run, complications might get worse."
The boy's eyes widened, the Adam's apple on his delicate neck bobbing.
"Okay."
Nice and pliant. What a treat. And what a loss to that jerk boyfriend.
Severus tried something of a reassuring smile. An effort he rarely made, but the boy had stirred a strange protective instinct. No need to scare him further.
"I'm sure everything is all right, Harry. In between partners, I suggest you get to know your body better. By yourself. Try fingering and toys with an abundant amount of lube, take your time to explore the sensations before coming."
Maybe practice some patience and restraint, too. And self-respect. With a face that cute, he was in real risk of ending up with another boyfriend who would only use him as a fucktoy.
But the boy didn't look relieved. Instead, he was squirming.
"Could you still examine me? In case there was something wrong?"
Severus leaned back and considered.
More often than not, men were visibly relieved if they got to leave the room without taking their pants off. Which meant the boy's worries were greater than they seemed – or he had a doctor kink. Wouldn't be the first of those, but certainly the most attractive. Nothing Severus wasn't used to handling, in any case.
"I understand the concern, Harry, but I truly don't think that's ne–"
"Please?"
Severus frowned. So, not that obedient, after all.
Fine. The boy was a paying customer, and they still had twenty minutes left.
"You can undress over there," he said, nodding to the curtains. "When you're ready, please come to the table."
While waiting, Severus typed a few notes into the chart, turning a few minutes later to see a naked young man standing by the bed.
Table. Whatever.
As much as Severus wanted to tell himself that he'd forgotten to mention Harry could keep his t-shirt on, the truth was, he didn't forget. He wanted to see the boy fully nude. And oh, what a sight he was.
He wasn't merely a pretty face; he was also beautifully built. Lean and slender, with a flat stomach and little body hair, his cock slightly erect as would be expected for the excitement alone. Except in this case, it was also possible that the boy was genuinely aroused.
Nothing in his vitals indicated anything but a healthy young man, and what Severus now witnessed before him only supported that view.
Though in no way related to the problem at hand, Severus made a quick but thorough examination. Eyes, mouth, neck, arms, back, groin, and testes. Harry stood unmoving, but his cock did swell.
So did Severus'.
"Alright. Now turn and lean over the table, steady on your elbows. I'll do an external check first, nothing will go in, okay?"
Another pretty blush swept over the boy's face before he turned and bent over.
"I was thinking, if it's an allergy, is there a treatment available?"
Focused on the gorgeous curve of a smooth, pristine butt, Severus didn't fully register the question. The arse was one of those perfect bottoms that deserved to be filmed and framed and put on display. The work of God, if one believed in a higher power.
"Treatment?" He ran a hand over the boy's buttocks. "Spread your legs a bit more."
Harry adjusted his position and jutted his arse back and up, exactly like he would do if he was preparing to take cock.
"Yeah. When I was little, I was allergic to tomatoes, but then my aunt started giving me slices every day, and after like a year, I wasn't allergic to them anymore."
At the last minute, Severus remembered the gloves.
When had he ever forgotten the gloves? Focus.
"Interesting idea. Fortunate for you, it worked and didn't send you to the hospital. Bend a little lower."
Severus spread the cheeks and marvelled at the perfect pink pucker. The boy had done a careful job with shaving, too. No cuts or irritation of any kind. A palpation around the groin and on the entrance revealed nothing out of the ordinary, only the boy's tiny sigh suggesting he was rather sensitive, his testicles hardening as Severus pressed and stroked his perineum.
"Everything seems to be normal, and the skin colour is healthy at the moment. When did you last have sex?"
"About a week ago? I'm not sore anymore, only a few days after. But it does ache."
"Alright. I'll get the lubricant and do an internal examination next."
"Okay."
Spreading the lube, Severus took a moment longer than necessary to massage the entrance. For relaxation, he said to himself, but honestly, watching the boy like that was pure delight.
Grabbing the edges of the table, Harry looked as if he was expecting full penetration. Shoulders tense, but hips obediently tilted in position.
"Nothing to worry about. This will be brief. Tell me if anything feels uncomfortable."
His finger slid in, meeting the expected resistance, the boy's muscle gripping his finger with proper firmness. No swelling or masses to his fingertip, either, as he felt around inside.
"Everything alright, Harry?"
"Yes," came a noticeably breathless reply.
Definitely sensitive.
"Remember to breathe. I'll examine the prostate next."
He pushed further in and found the gland, nice and firm under his touch. And responsive, like the rest of the boy.
Harry let out an audible gasp, knuckles white as he gripped the table harder. Between his legs, Severus could see his erection growing.
Severus could have ended the examination there. Nothing pointed to a problem of any kind, and honestly, sticking his finger inside the boy had been unnecessary in the first place. But Harry had asked, and now Severus was curious.
"I trust there's no pain?" he asked while adding more lube.
"No. All good."
"I'll add another finger to try out how, um… flexible your rectal walls are."
"Okay."
That second finger met a grip that almost sucked him in, and with Harry's clear moan, Severus' cock sprang to full strength. Quickly and quietly, he slid his free hand into his trousers and strapped his erection under the waistband of his boxers.
"Sorry," Harry muttered. "I'm a bit sensitive."
Talk about an understatement.
"It's quite all right. People react differently to the examination."
Though very rarely with such honest, unadulterated arousal. If Severus took out his cock, the boy would probably spread wider and beg for him to go for it.
After a few strokes on his prostate, the boy was actually panting. And at the sudden urge to go on and bring him to orgasm, Severus was sharply reminded that he'd gone way, way past the point where he should have stopped. If not for the morals, then to keep his doctor's license.
As calmly as he could, he pulled his fingers out, took off his gloves, and dropped them in the bin, then cleared his throat.
"You can get dressed now."
Harry turned but made no move to go and dress. Biting his lip, cock hard, he was the very definition of fuckable, and the strain in Severus' pants was nearing painful.
"Doctor," he said in a quiet voice. "I'm certain I have an allergy, and I really wish you'd prescribe me the treatment."
"Put your clothes back on, and we'll talk."
The boy stepped forward and placed a hand on Severus' arm, turning those big, bright eyes to him. "Please. I don't want another partner saying I'm ugly."
Severus glanced down at the small hand on his sleeve, then up at the green eyes glistening with unshed tears. His own cock as hard as Harry's.
He licked his lips.
When weighing between what was right and what was enjoyable, when had he ever chosen the former? Especially when the alternative offered itself so easily?
With careful restraint, he detached his arm from the boy's hold.
"The treatment is called desensitisation. A controlled and repeated exposure to the allergen."
Harry's face lit up with hope. Surely the prettiest sight Severus had ever seen.
"You'd do that?"
Severus swallowed around the lump in his throat.
It was too easy. Manipulating patients to do as he wanted was always easy, but given what was at stake, this time was criminally easy. Or was it just criminal?
"We should first determine if the condition is indeed an allergy."
"Where will we get the semen?"
A good doctor, a good man, would have arranged a skin prick test. Simple, quick, minimally invasive.
Too bad Severus wasn't good.
"Semen allergy is so rare that I would have to order custom-made material. That could take weeks."
"Weeks?" Harry's face dropped. "I can't wait weeks to have sex again!"
Trust a young man to be more concerned about living without sex than risking his health.
"We could also try direct exposure… fresh from the source."
It took the boy several seconds to understand. Given that his instinctive reaction was to smile, the thought clearly wasn't unpleasant. "You'd fuck me? Personally?"
Whatever remained of a normal human conscience deep within Severus' withered soul cried out at the words. Ignoring the voice wasn't hard.
"Yes."
"Now? Here? Today?"
Severus checked the watch. Harry was the last patient before lunch. Guess he would skip food today.
"Yes, I could arrange that."
"Thank you, Doctor! So much!"
The boy looked like he was one step away from hugging him, but contained himself at Severus' frown.
"I hope you understand that this is a highly uncommon procedure, and that it would be for the best if we didn't mention it outside this room."
"Absolutely. Not a word to anyone."
Severus studied the boy. He was so enthusiastic. Much more than he should be, as he was about to get fucked by an older man he'd just met. The white coat was a powerful thing. Then again, if Harry was too naive for his own good, that wasn't Severus' concern.
"If you're ready, I believe we can start."
Severus sure as hell was ready.
Harry nodded. "Where should I go?"
"You can take the earlier position. I trust you were steady and comfortable there?"
Watching him bend over the table, spreading his legs and pushing his arse out again, Severus' cock was about to burst out of his pants.
Harry glanced over his shoulder. "Like this?"
Severus unzipped and took his cock out. "Yes. Now, please stay still while I proceed with the extraction."
Spreading the lube over himself and the boy's arse, Severus figured the whole thing would be over in minutes. Every stroke already felt incredible, and the need to bust his load into the boy was curling his balls into tight rocks. He slid two fingers in for measure.
"Ready? I'll go slow at first."
"Okay."
A push and he was in, his moan thankfully drowned in Harry's louder one. Another push and he was sliding in all the way, like Harry's arse was sucking him in. Severus took deep breaths to calm down.
"Any discomfort?" he asked, although the soft moans and tiny pushes back hinted that the boy was very comfortable indeed.
"No, it feels really good. You're so much more careful than my boyfriend."
Severus gritted his teeth. If he had an arse like this to fuck every night, he'd treat it like a princess.
"Lube and preparation, Harry. They make all the difference."
At least he was teaching the boy valuable life lessons while taking advantage of him.
The first thrusts alone made Harry's breathing hitch. Not that Severus had expected anything less. Responsive as he was, he might even come.
"I do believe your release would be beneficial for the experiment, Harry. You should stroke yourself to reach orgasm."
"Oh, I don't need to wank. I usually come by fucking alone, several times during a single round."
He… what? Multiple prostate orgasms during one session?
"You're very fortunate."
And the perfect bottom. Like a unicorn. Severus was fucking a unicorn.
True to his words, in only a few minutes, Harry was coming, the tension gathered in him released in a soft cry and shudders that went on forever. Severus slowed his pace to marvel at the sight, then continued, his own balls aching for the same. Harry seemed immediately ready for the next buildup.
Gripping the edges of the table, moaning at every thrust, he was a dream come true, but the noise they were making was absurdly loud. Skin slapping on skin, Harry's moans and Severus' grunts, the table creaking at the motion… Thankfully, the room was tightly soundproof, the red light outside serving as a warning for everyone to stay away.
Doctor at work, bloody hell.
"Harry…" Severus panted. "I believe I'm getting close to ejaculating."
"Okay, yeah, I'm ready to come again too."
Just to experience the exquisite joy of a shared orgasm, Severus delayed a bit longer. The moment Harry cried out, he let go, groaning his pleasure, his grip on those narrow hips tight enough to bruise.
Every muscle in his groin quivering after the shot, Severus had to gather all his strength to pull out and not stay to savour the moment. Harry recovered much faster.
"Is it red? It's not burning like before, but I can feel a sorta throbbing."
That's because you've been fucked in the arse, boy, Severus wanted to say, but one glance at Harry's behind sealed his lips.
The opening was red, yes, but no more than was expected after any enthusiastic fuck. What caught Severus' attention, though, was the beautiful gape, and a gush of his own spunk drizzling out of the reddened hole.
All plans to leave this to a one-time treat were gone in a heartbeat.
"Yes," Severus said, wiping his mouth and zipping himself in. "I'm afraid there is some swelling and colour."
He handed Harry a tissue. "Here. You can get dressed now, and then we can discuss options."
The discussion turned out to be brief.
Looking into the bright eyes of a too-young boy he'd just fucked – in his office, as the boy's doctor, under the pretext of a fake allergy test – Severus couldn't find a single bone in his body to regret. And Harry, in his naive trust and eagerness to fix his imagined condition, agreed to Severus' suggestion with gratitude.
"So, every Friday at three o'clock for the next five weeks," Harry repeated, then frowned. "Will this be very expensive? I mean, you are a specialist and–"
"For a course of treatment, we offer a discount. If we can fit the appointments into a twenty-minute time slot, the cost is about half."
Harry's face lit up. "Oh, that's great!"
"Remember not to wash for at least three hours, to allow your body to react to the allergen."
"I'll remember. Thank you."
"I'll see you next Friday then."
As the door closed, Severus leaned back in his chair and let out a long, heavy sigh.
He might be going to hell, but the way down would be a glorious ride.