Cheat a lot to reverse the active and passive roles.

Isaac was **** to make a lot of hard decisions about what he really wanted from this situation, from Rarity, from this whole perverse reality-warping exercise on a grand scale.

As it turned out, even when given the opportunity on a silver platter, he didn't want to be an uberdom. It didn't sit well with him. The weight of responsibility strained his nerves, created a possibility of failure and letdown that he couldn't stand. And the rewards in trade didn't really appeal enough to him on their own to be worth the trouble.

That left him with two options: Give up on Rarity, or change Rarity to suit him better. And as much as he liked going with the flow and keeping their personalities as intact as possible... he'd already changed so much, and committed to changing even more. The whole point at the outset was that he was going to put himself first for a change. And if that meant changing the ponies on a fundamental level to suit him better, then... that's what he was going to do! He had the power!

After swallowing the lump in his throat, Isaac lifted Rarity's arms off his shoulders and scooted back a little. Rarity seemed surprised and more than a little concerned. "Something wrong, dear?" There was a hint of fear in her voice, that she might've just blown her one and only chance with a real Master candidate.

Isaac tried to ignore his impulse to reassure her as he formulated his questions - questions that he'd have to say directly to her face.

"Well... I'm just wondering... Based on my 'research' over the past month... The most popular stories involving the Harem Master are not ones where he's some kind of uber-dominant confident mega-stud, but rather a **** male who's a bit more nervous and passive in his role while still being full of pent-up lust, aren't they? Don't all sapient creatures in this world vastly prefer a Harem Master who sits back on his throne while his eager, experienced slaves indulge, spoil, and pamper him with pleasure and gifts while doing most if not all of the actual work? Isn't the whole title of Harem Master kind of almost a figurehead, since everyone 'obeys' his commands because they want to indulge and spoil him and be rewarded with pleasure, rather than him having ultimate authority? So was this whole submissive presentation of yours an elaborate test to see which kind of Master I'd be, because you'd prefer to be a gentle dominant bottom to a submissive top?"

Rattling this off face-to-face, Isaac got to watch Rarity's expression change as he spoke. She was confused at first at his long-winded non-sequiturs. Then she blushed as he seemed to hit the nail right on the head, becoming bashful at her own actions and their seeming incongruity with the rest of the world's attitudes. And then, at the final question, Rarity's face changed to a sultry smirk.

"Well, well, well!" she replied at last. "Even with a beautiful lady offering you her whole being on a silver platter, you still retained some of your wits. Though I certainly can't blame you for taking a while to see it, with your other head taking up so much of your attention, hmhm~." She leaned in and quickly kissed him on the lips, far more forward and confident than she'd been a few minutes ago. "Congratulations, Isaac - you passed my little test~."

Isaac, dazed from the sudden kiss, couldn't believe how well it had all worked. He'd rattled off those questions directly into her face, and she didn't seem to find any of it odd or suspicious! His preparatory questions back at the station were hopefully paying off.

Rarity reached down and stroked the base of his cock again while planting kisses on his neck, making the human shiver in lust. "You're absolutely right - I have no time for greedy brutes who take, take, take, and **** their station without a care in the world," Rarity murmured, completely contradicting her whole heartfelt pitch from moments ago. Her velvety soft hand slid beneath his cock and stroked his heavy, full sack as well, as much as she could reach from where she sat. "I have far, far more patience for a man who understands exactly how lucky he is, and is grateful for every moment, every touch, every kiss, and every load~." She punctuated that last word by lighting up her horn and embracing the full weight of his testicles in a tingling embrace, lifting them up and squeezing them gently against his own thighs.

Isaac let out a rather undignified moan, and Rarity chuckled, almost purring. He realized that he'd swapped out one monster for another - a confident seductress rather than the world's neediest, most devoted ****. It seemed that no matter how much Isaac changed reality, there was no easy way to get around Rarity's sheer passion!

But then again, Isaac vastly preferred this version. All the responsibility was gone, and Rarity was taking the figurative wheel. He didn't have to make any hard decisions. His sexual vacation paradise could continue without any bumps.