After our little heart-to-heart, Twilight and I reunited with Derpy and allowed the Princess to lead us where she needed me to go.

It was a fairly long journey through the campus building, past armored Royal Guards keeping others out and through doors marked 'Staff Only.' The further we walked, the more trepidation I felt. I could scarcely believe that maybe, just maybe, we were on the cusp of taking the whole 'addiction' thing out of play entirely – but what then? I still had a Princess to rehabilitate somehow. And at some point, I needed to figure out how my life was going to work.

By the time we came to the double-doors of one of the larger lecture halls, sealed off by a quartet of guards, I was fairly stressed out. I tried to calm myself by admiring how Derpy's giant naked tits bobbed and swayed.

We walked inside. The room was a semi-circular lecture hall, probably capable of seating over a hundred pony students. A short wall separated the front rows of seats from the presentation floor. There was an empty medical examination table in the center of the floor, an overhead transparency projector on a nearby table, and a matching projector screen deployed along the back wall.

There were only a few other ponies in the room besides the three of us, either seated in the front row or standing at the rim. Trixie and Moondancer were standing on one side of the floor, talking amongst themselves before we walked in. A slender and somewhat drowsy-looking Luna was leaning against the dividing wall on the opposite side. Seated near Luna was the massively endowed Cadance, her pink dress-covered bosoms overflowing onto the two desks on either side of her.

Seated directly in front of us was prim and proper Celestia, whose composure immediately slipped as she laid eyes on me – her nostils flared and her pupils momentarily shrank. Her horn lit up with golden light, and the doors we'd entered through swiftly shut behind us. A shimmer passed over the doors, and suddenly the outside bustle of the school could no longer be heard.

There were a few moments of silence as everyone in the room looked at me, then among themselves, then at Princess Celestia. No one really knew where to start or what to say.

Twilight finally looked at me and gestured at the examination table. I reluctantly hopped on, resigning myself to my role as a subject of scientific inquiry. Derpy walked over to the side of the room to join Trixie and Moondancer. Twilight walked over to the projector and levitated a manila folder out of her messenger bag. She set down the folder on the nearby table next to the projector, then opened it to reveal notes, printed reports, and transparency slides. The sounds of papers shuffling across wood were deafening in the silent, soundproofed theater.

The purple princess opened her mouth to speak, but Celestia stood up and Twilight's mouth immediately re-closed.

Smiling serenely and regally in a very practiced way, Celestia looked at all the ponies present and said, "I would like to thank you all for your help and understanding." Her words slightly echoed around the room. The Princess continued: "When I imagined how ponies might react once they learned the truth, I always feared the worst. But your support thus far has given me comfort... and hope. I know it can't have been easy, to see your leader at her weakest, in her darkest hour, and to... and to process knowledge so terrible about your own bodies. Thank you, all of you." She sat back down and looked directly at the junior Princess in the room. "Twilight, if you may."

Twilight glanced at me, then at Celestia, then down at her notes. She scoffed quietly and shook her head just a little bit. "I must have done this dozens of times when I was your student," Twilight Sparkle muttered aloud. "But now..."

The purple Princess sighed and used her horn to send a charge of power into the overhead, casting a rounded rectangle of light onto the projector screen behind her. She placed the first transparent plastic page onto the device. It was a printed title page with big black letters reading: 'The Effects of Pascal's Human Semen on Ponies Through the Lens of Addiction.' Beneath that, in smaller font, was: 'Preliminary Study Results.'

"As you know," Twilight began, haltingly, "I was charged to... study the effects of human semen." She still seemed mildly disgusted by the topic. "Using samples from the first human in Equestria for over a thousand years. Or... at least the first equivalent."

Twilight walked in front of the projector while her horn switched out transparency pages, pacing back and forth as she spoke.

"We started with a hypothesis based on my friend Moondancer's... experiences and observations from Saturday. She..." Twilight momentarily lost steam and shook her head at the ridiculousness of it all again. "She hypothesized–"

"Apologies, Twilight Sparkle, but," Luna interrupted, "is this all really necessary?"

"Wh-What do you mean?" Twilight asked nervously.

Luna pushed herself off the dividing wall she'd been leaning against and straightened her regal navy blue dress. Her slender height gave her an imposing advantage over the rest of the room. "You're ready to show your work, and we thank you for your diligence. But we are not here to gush over your methodology. Might we please instead skip to an actionable conclusion, if there is one?"

"Luna..." Celestia started.

The Princess of the Night gestured between me and Celestia. "Having these two in the same room is clearly causing my sister distress."

Celestia shook her head. "It's fine. I can wait."

"I cannot," Luna spat, leveling an intense look at her sister. Her starry mane waved dramatically in reduced gravity as her head turned. Then her expression softened. "...I am tired of seeing you like this."

Twilight looked down at the floor for a moment, then sighed and shut off the projector with a flicker of magic. "I can always show my report later, I guess." She stepped in front of the table and rubbed her temples before saying, "The... addictive element of human semen – of Pascal's semen – is..." Twilight paused and shook her head, like she couldn't believe what she was about to say. "It's... the product of the testes themselves. The spermatozoa. ...Sperm cells."

A palpable silence washed over the room.

"It's not a biological process, either," Twilight continued, her eyes clouded over as she recalled the day's experiments. "What happens – what seems to happen, anyway – is that it gets... absorbed. Magically. As soon as a sperm cell makes contact with sensitive nervous tissue, it gets converted into energy or a signal or something and transmits through the nervous system and directly to, we assume, the pleasure centers of the brain. It's brief and instantaneous and almost imperceptible, but... you can see how it might create a physical and psychological connection between the semen and... pleasure. And-and it scales by volume."

Celestia gripped the railing in front of her desk and leaned forward. "Sperm cells? All these years I've been craving...?" She put her hand in front of her mouth as her pupils shrank.

I was hunched over, my fingers pinching the bridge of my nose. This all sounded so stupid, and yet...

"Of course," Luna growled sarcastically, letting out a snort of contempt through her nostrils. "Tying us to the very means of their reproduction? Oh yes, that fits the Masters' profile so perfectly."

"W-Well," Twilight went on, "that's just the one component. We assume the other parts of the semen, the fluids from the seminal vesicles and the prostate glands, they might provide the... flavor and... tingling." Twilight was starting to look a little green around the gills. "But we haven't run enough tests to isolate those elements. Scientifically speaking, these conclusions aren't even rock-solid yet; there simply isn't enough data and review. And yet, the data from the spermatozoa stands out so significantly, that... that... the conclusion is hard to avoid. We can be reasonably confident about its role."

Princess Luna took a breath to calm herself, though it didn’t seem to help much. "Then what is to be done?"

"That’s why Pascal’s here," Twilight said, turning towards me. "If the goal here is to render him non-addictive so that he may... do his job, I've devised a spell that should affect his present and future sperm so that–"

"Wait wait!" Celestia suddenly cried out. We all looked and she was partially out of her seat, her hand outstretched. She looked panicked. "Twilight," she said gravely, "do not tell me about this spell."

Twilight became confused and distraught. "W-What?!"

The Princess's magenta eyes slowly drifted to the floor in shame. "I do not want to be given the opportunity or... temptation... to try and reverse-engineer it."

The lifelong student just stared at her mentor, looking for a moment that she was about to start crying. Twilight took a deep breath and managed to pull herself together, steeling herself. "O-Okay. I'll just cast it then." She forced herself to march back around the table so that she could face me, still sitting on the examination table with my back to the rest of the room.

As we faced each other, both of our eyes drifted down to my crotch. I was still fully clothed, though the enhancements done to my genitalia meant that the shape of even my softest state could be gleaned through the shape of my jeans.

Twilight, full of stress, just groaned and rubbed her temples. "Please... take your pants off," she said, resigned.

I took a glance over my shoulder at Celestia, fearing the diarch's reaction to my exposed junk, but I hopped off the cot for a moment and quickly shucked off my lower clothes. I hopped my bare ass back onto the table, and my hefty-for-a-human penis and ballsack dangled over the edge in front of Twi.

Her mood considerably soured at the sight of my cock. Like she'd said, she probably never wanted to see it again for a very long time once this was over. She closed her eyes and focused, charging up her horn with magic. Longer than usual, she channeled her magic for a solid twenty seconds, making me nervous about what she was about to do to my unprotected family jewels. The things I was willing to do for peace...

Almost faster than I could blink, the purplish-pink magic discharged all at once as a direct beam into my balls. Tendrils of magic spread out from there, running both across the skin and ethereally within my body. I felt like my whole pelvis was hot and vibrating for a few seconds.

And then it was over. The beams, the tendrils, whatever – they faded away, leaving just me looking outwardly unaffected.

"Not... as bad as I was expecting for a magical vasectomy," I deadpanned to let off some stress.

"It wasn't a vasectomy," Twilight muttered. "It–"

She was interrupted by Princess Celestia, who had already gotten out of her seat and was practically stomping towards us. The entire bench was engulfed in her golden magic, and I was spun around one-hundred-and-eighty degrees. In one smooth motion, Celestia knelt, guided me into position, and inhaled my partially chubbed cock into her mouth.

Loud, desperate slurping sounds echoed through the lecture hall. Everypony else in the room looked on, stunned, as their Princess of the Sun debased herself in front of them. Celestia's body didn't seem to care anymore; she sucked on the tip of my penis like I was a drinking fountain in a desert before taking the whole length into her mouth repeatedly. Her steaming hot salivation dripped past her thin white lips and down my shaft, running down the crease of my ballsack.

My cock slowly hardened in her mouth; my biology responded to her physical ministrations. But my heart wasn't in it. This wasn't sexy to me. The desperation and shame in the Princess's eyes, the hearts breaking around the room as they watched their leader do something they'd never imagined she'd do in a million years... It all chilled my blood and made the idea of an orgasm very distant in my mind.

Despite Celestia's expert oral treatment, I wasn't cumming anytime soon. The Princess's patience waned quickly. Her horn lit up, and I felt a familiar buzzing sensation in my whole crotch.

Seconds later, white-hot pleasure rammed through me. Instantaneously I came, spurting my hot discharge into Celestia's maw. She pulled back slowly, filling her mouth with as much seed as she could store in her cheeks until she was bulging like a chipmunk. When her mouth was completely full, she let my cock slip through her lips, and the last of my cum landed erratically across her muzzle. A few ponies gasped, as though watching their beloved Princess get facial'd was even more sacrilegious than what had already happened.

As I cooled down from my spell-induced orgasm, Celestia let my mouthful of cum simply rest in her mouth for a few moments. She actually swished it from side to side a couple of times before swallowing. It took more than one swallow to get it all down. Three or four gulps later, and the room was silent as they waited for her reaction.

Celestia swallowed dryly again. Her mouth hung open for a few seconds, and her eyes were wide and staring off into nothing. "It's..." she gasped, "it's not the same. It-It tastes the same, but it's not... the s–" She bit down on a knuckle of her hand and fought back a choking sob. A cry of anguish rebelled and moaned out of her throat.

I must confess, I'd been raised by teetotalers most of my life and had never really been exposed to any other addiction than porn. I could only barely imagine what Celestia had to be going through. If the kick was really gone from my human semen, was this like if a drug addict suddenly couldn't get a high? If there was no pleasant buzz and dulling of the senses to drinking alcohol? Or was it like if sweet and sugary foods still tasted fine but no longer satisfied your sweet tooth? Or if there was no precious moment of sweet relief to follow the pleasure after a masturbation session? Was it somewhere in-between those, or something I couldn't even imagine?

While I was thinking, there was a quick blur of magic that zipped across Celestia's muzzle, taking an unnoticed glob of semen with it. I tracked it over to the side of the room, where it swiftly disappeared into The Great and Powerful Trixie's mouth. She let it sit on her tongue for a few moments, then swallowed. Shortly after, her muzzle contorted in sudden anger. Her horn levitated her magician's hat off her head and slammed it onto the floor while Trixie turned around and muttered strangled curses into the audience. Moondancer and Derpy looked on at her in concern.

A few moments later, Celestia sharply inhaled and made an extreme and visible effort to compose herself. She stood up, smiling her practiced smile. A wave of golden magic from her horn wiped off the rest of the splattered semen from her face, and she looked like nothing had happened. She looked over my head at Twilight and said, "Twilight Sparkle. You've solved one of the greatest mysteries of my life. Thank you... so very much."

Celestia walked around the table and went to give her student a big hug, resting Twilight's head in the crook of her neck. Twilight seemed visibly apprehensive and didn't quite fully hug back. She seemed to be leaning her head so that no part of her body was touching any part of Celestia's that had recently had my semen on it. If Celestia noticed, she didn't say anything or react in her expression.

When they pulled out of the hug, Luna stepped closer and asked, "It is truly over, then? Pascal is 'cured'?"

"Yes," Celestia said, more than a little sullenly despite herself. "It did not take the edge off."

Luna let out a sigh of relief. "Then my thanks as well to you both, Twilight and Pascal. Not only have you armed us with knowledge, but my sister finally has a chance to heal." She looked across the way at the trio of mares on the sidelines, adding, "Our thanks to you too, Moondancer, Trixie Lulamoon, Ditsy Doo, for your support."

"I-It was nothing," Moondancer replied sheepishly.

Derpy nodded and said, "It was the right thing to do."

Trixie still looked mad, but she shrugged and nodded her head before going back to pouting and tapping her foot.

As I pulled my underwear and pants back up, Cadance raised her hand and asked, "So what happens now?"

"Therapy, right?" Celestia said almost immediately, looking down at me. "I could really use my first session tonight."

So soon? I thought, grimacing. I looked over at Derpy worriedly. Now that I was cured, I really only had one thing on my mind: Consummation.

Derpy noticed my look and shook her head at me calmly. "I can wait. I'm still off work for one more day if, y'know, the Princess really needs you right now."

I knew it was important, but honestly, the prospect of spending another night with the Princess in her... 'big' form... filled me with a mysterious, unspeakable dread. I found myself tongue-tied.

Celestia took notice and frowned. "Please, Pascal. Today has already been so difficult. There is so much to do tomorrow." With an aside glance at Luna, she added, "Equestria cannot wait 19 days while I suffer withdrawal in a dark cave."

Luna let out a sigh through her nostrils and looked away.

The Princess of the Sun took a couple of steps back towards the door, her eyes fearfully lingering on my crotch. "My chambers, thirty minutes, please. Meet me there, just before the setting of the sun." That said, Celestia immediately turned away and walked out through the classroom's doors, joining the royal guards outside who didn't have a clue what was going on thanks to the soundproofing spell.

As the doors swung closed behind her, I just put my head in my hands and hissed out, "Shiiiiiiiiiiiiit..." Derpy walked up to the cot and sat beside me, rubbing my back.

"Pascal," Luna called out, walking up to the other side of the bench. "Did you get my message this morning?"

"Sure did!" I replied with obviously fake cheeriness.

"Have you put some thought to that idea? That you must use your power more actively?"

"You saying that applies here?"

"More than any other situation, I would think. My sister's mind relies on your power right now, but it still wavers. If you must forcibly guide her mind back to stability... you shouldn't hesitate."

Twilight recoiled. "Are you giving him permission to outright mind control Celestia?!"

"He's proven he can use it to heal. I trust him." Moondancer looked ready to speak up, but Luna cut her off: "I understand that with too light a touch, spurious conclusions can be reached. This is delicate work. It will of course be best if Celestia can be guided to healthy epiphanies through regular means. But Celestia's greatest fear right now is not being in control of herself. Pascal needs to show her that her lusts can be managed... even if someone else must hold the reins for a little while." Luna reached over and put her hand on my shoulder. "It's also clear to me that you're afraid of repeating the events of Saturday night."

"Ah," I grumbled, slumping my shoulders, "is it that obvious?" Gee, why wouldn't I want to get fucked half to death for a second time?

"I believe your power is the key to making sure it doesn't happen again. If she starts to lose hope and surrender to the demands of her body... you have the ability to force her back."

"I tried that night," I muttered. "I tried to stop it. But she'd already decided that that was the only way, and I couldn't muster a strong enough argument to dissuade her."

Luna hesitantly pulled her hand back and thought for a second. "Well... The context has changed now. She has placed authority in you, and so your words will have greater weight. The words you told her Sunday morning are still in effect. No matter what, that... event shouldn't happen again."

I buried my head in my hands again. "Even so. What the hell do I do? What's my game plan?"

Twilight stared incredulously at me now. "You haven't made a plan yet?!"

"It's only been like two and a half days!" I protested. "I wasn't expecting to get the green light so fast! And if you haven't noticed, a lot's been going on around here!"

Trixie groaned in frustration, startling all of us. "Ugggh! Just cum inside the fucking Princess, Pascal. Make her your bitch if you have to. That ought to at least get her through the day."

I facepalmed and started strangling the air. All of my private thoughts on the matter started to spill out. "It's not that simple! If I go too far with the sex, doesn't that just tell her that she's a slave to her desires, that they can't be overcome? This is Day 1, people! This is first contact! It's incredibly important; it'll set the tone for the rest of the therapy... won't it? I mean fuck, I'm not exactly a PhD over here!!"

Princess Cadance loudly cleared her throat.

Everypony else looked over at her; she smiled directly at me. "What you should do tonight, Pascal... is cuddle her. Be there for her. That's what she needs right now."

I raised an eyebrow.

Cadance started counting on her fingers. Her elbows pressed into the sides of her gigantic breasts as she did so. "She needs to get used to how her body reacts to you... You need to close the emotional distance between you, since you've been dancing around each other and keeping each other at arms' length... She needs reassurance that you're not afraid and will stick by her, through thick and thin..." She put down her three fingers and smirked. "Cuddle her. Be her lover. And as Luna said, use your power to keep things sane."

I turned my head back towards the door and sighed. "Makes enough sense," I said, even though part of me was still worried this could all go sideways very fast...

Twilight looked towards me, an unsure look on her face. "Pascal... Could I... maybe... Is there some way I could...?"

"Hm?" I asked.

She trailed off and looked away, her face growing red. "Nevermind."

Derpy gave me a quick kiss on the cheek and hugged me with her wing. "You can do it, Pascal. I'm here believing in you the whole way."

My stomach growled.

I hopped off the cot. "Alright, a little bit of dinner. Then... I cuddle a giant Princess."