Celestia has concerns. Isaac has more "questions."

"But that's worse," Celestia added sourly.

Isaac tilted his head. "Huh?" It all sounded pretty great to him!

The tall alicorn knelt down, going all the way to her knees in front of the human, and she was still a head or so taller than him. The radiant heat of her body warmed Isaac's face and chest, and the light of her multicolored mane and her pure white coat made him feel like he was on a bright, sunny beach. She put her slender hands on his shoulders, with surprising firmness and strength.

"When all those mares - no, when all the females of the world - no, when all sapient creatures of the world realize that you are the one true male we've all been waiting for..." The alicorn took a shuddering breath, clearly affected as well. "...It's going to be anarchy. There won't be enough of you to go around; everyone will fight to scratch their itch first. Jealousy will fill the hearts of those waiting the longest for their turn. Some may try to foalnap you and spirit you away to have you all to themselves. But even in the worst-case scenario, if everyone waits their turn patiently and don't fight over you..." She gave him a look of utter sincerity that disarmed Isaac's smug disposition. "You'll never have a normal relationship again. Every interaction you have in this world, from today until the day you die, will be all about sex. You'll never be given the chance to pursue anything else, to be your own person, to forge a relationship with someone you love."

Isaac didn't know what to say to that. He hadn't been expecting this at all.

Celestia removed her grip on his shoulders and scooted back a little, glancing aside bashfully. "I know it still sounds like heaven to you, being at that ripe age for sowing your wild oats, as it were. But... I was excited to become a Princess, too. And now, more than a thousand years later, I catch myself wishing I could have a life of my own, to meet someone who could think of me in any context outside of 'Princess.' I wouldn't wish that on my worst enemy, and I certainly wouldn't wish that for you, a stranger who had **** but to land in our sexually skewed world."

Somehow, despite warping the entire world on its head and making himself the de facto harem lord of the world... Celestia still had her wits about her and was worried about his social needs. It was so bizarre that Isaac just had to process that for a minute.

And the worst part was... she was kind of right.

Obviously, making millions and millions of anthros dependent on him for sexual satisfaction was a logistical problem that needed to be solved, period. That wasn't even a long-term problem - that was a ticking time bomb measured in hours at this point.

But Celestia's concern for his mental well-being after a lifetime of constant sex... well, it made Isaac wonder about the future. Certainly, in the present moment, he just wanted to indulge and disappear into a sexual fantasy. But later on, when he was finally starting to feel satisfied and maybe wanted to enjoy life outside of sex? Or maybe if he just wanted to cuddle and talk with some of these gorgeous mares about their lives in-between rounds? Hell, just having Celestia care about him right now was pretty nice...

He didn't want to give up what he had already established, but that created a fascinating puzzle: How to get back to a fun, sexy equilibrium from here?

"Well," he finally said after a few more moments of thought, "I don't know if it's going to be that dire. People in this world are all pretty relaxed, comfortable, and in-control when it comes to their sexuality, aren't they? N-None of the natives are gonna get so pent-up and frustrated that they lose control or- or get upset, are they?"

The instant after Isaac asked his first question, Celestia's outfit changed, making him stutter on the second. Her long, flowing, ultimately chaste robe was gone. Her alabaster body was almost nude now, showing off her statuesque goddess-like physique - her trim stomach, her thin waist, her wide hips, her ample breasts, her long legs... From a golden collar, two strips of red cloth with gold trim draped down over her breasts and barely managed to cover her nipples. A beaded waistband wrapped around her waist, from which hung a gauzy skirt that was parted along one leg, not to mention transparent enough that Isaac could see her pussy directly through the material.

The room had changed slightly as well. Rather than two thrones from which the diarchs of Equestria could sit and render judgment down at their subjects, there was an elevated rounded platform with a red velvet mattress and a bounty of cushions and pillows. Celestia lounged upon the padded platform with practiced sultriness, smiling warmly down at him as she stroked her legs, her hands roaming down her leg and up her side.

"You're very observant, human - and fortunate," Celestia replied in a far more relaxed tone than moments before. "Ponies, dragons, changelings - we've all had to get used to expressing our desires on a regular basis. The ones who have to wait, they will surely find other ways to find release in the meantime. I know for a fact that not every world is so comfortable, so it wouldn't surprise me if our culture has been a shock to you, Isaac. You say that mares have given you a wide berth, but I wonder if it hasn't been the other way around?"

Isaac chuckled bashfully. Celestia's sudden sexual confidence was definitely having an effect on him, one that made him... almost wary, in a way. "Ah, y'know, you're probably on to something. My world is a lot more... prudish. Not that I'm not interested, but... with a brand new culture, it's hard to know where the lines are, what's responsible, all that jazz." He was lying, roleplaying a little, but he was enjoying his new lot in life already.

"Then allow me to give you an education," Celestia purred. Her horn lit up with golden energy, and Isaac's hand was tugged upward, inviting him to climb up onto the royal... bed? Platform? Whatever it was, he climbed up into it. The rounded love nest was large enough for a mini-giantess like Celestia to lay upon it comfortably, so to a mere mortal like Isaac, it was enormous. "I'm the foremost authority, after all - what with how many ponies scream my name at climax, hmhm."

Isaac felt extremely overdressed, so he started to take off his clothes, which were the street clothes he'd landed in a month ago. He was also starting to get not a small amount of performance anxiety. "Ah, are we- er- What do you think about the whole... millions of mares problem?" Ambiguous question only, phew.

"We'll get there," Celestia reassured him. Her magic's aura helped unravel his belt and toss off his shoes, her magenta eyes looking him over hungrily. "We may have to limit your exposure until we find a long-term solution, but that will be then. Put your thoughts aside for everything but right now."

"It sounds like- er- D-Do you want me to have sex with as many ponies as possible?" Isaac asked giddily, knowing full well what the answer would be.

To his slight surprise, Celestia's demeanor didn't change much. Her gaze just got a little more intense, like she was looking into his future with the proud confidence of a chessmaster. "Consider it your divine mandate."

Her alicorn magic stripped him of all of his clothes, his underwear peeling off last. Isaac was fully hard, but compared to the ten-foot-tall demigoddess of a woman whose bed he was sharing... well, six inches didn't feel like much. Celestia pouted just a little bit, though as she opened her mouth, it seemed like she was only going to have encouraging words for him.

Isaac's insecurity beat her to the punch anyway. "Have my cock and balls been slowly but steadily growing since I landed in this world?" he blurted out.

Once again, reality changed in an instant. One moment, his normal six-inch cock was erect in front of him, pointing straight out at Celestia. The next, Isaac's vision was suddenly blocked by the presence of his own enlarged cockhead, attached to a shaft standing proudly up and high enough that the tip was just above the level of his eyesight. He could feel his balls pooling against the red velvet between his knees.

His heart was pounding trying to pump blood into this thing. "I-Is this... healthy?" he groaned. Instantly, the darkness at the edges of his vision - which he didn't realize were there - disappeared, and his heart felt normal again.

Only then did he realize that Celestia had her face pressed against the underside of his cock, covering one eye while the other stared up at him with glittering delight. "I don't know," she purred, "you tell me."