With a little tweaking, we can make this work.

One cumming-inside-Rainbow-Dash later, Isaac didn't feel like he had that much more control over the situation.

He helped move her cum-inflated body over to the steps of Twilight's castle to rest while she recovered from her blissed-out, fucked-out trance, but when Isaac went to retrieve their clothes, he noticed that hers didn't seem to exist anymore.

"Huh...? Why would I wear - haah - clothes outside of a - phew - Wonderbolts performance?" was Rainbow's way of explaining things as she caught her breath. "I know you - ngh - humans are pretty shy, but, c'mon, seeing a nipple or, mm, a pussy isn't gonna kill ya... Besides, what are ya gonna do when a cum-wave gets going, huh?" The look on Isaac's face told Rainbow everything. "Wait, you don't have cum-waves on your world? ...Oh, yeah, you don't really have the whole Master thing on your world, either... Man, that must suck! Do you humans ever get off??"

That was more or less how Isaac learned what his questions had wrought. Spontaneous shared orgasms were just a part of life in this world now. And Isaac was now a living generator of them.

The thing was, it was hot. Isaac really liked the idea. It made the problem of pleasing dozens of ponies at once trivial. But there were a whole lot of potential knock-on effects that Isaac wanted to get in front of, too.

"Sapient creatures native to this world don't really get addicted to sex and pleasure, even at **** levels, right? They consider it a healthy but almost incidental part of their lives, and don't feel any strong need to go seeking out the greatest highs possible, right? Sex for creatures of this world is more about giving pleasure to others, especially their potential Master, right?"

Rainbow scoffed, blowing some of her sweat-matted rainbow mane out of her face. "That's a lot of fancy egghead talk. No wonder you fucked Twilight first." She seemed to have recovered her stamina and wits, even though she was still naked and filled with enough cum to look pregnant on the steps of Twilight's castle. She didn't seem the least bit bothered by her situation. "Look, I get it, you're worried about all the ponies in town jumping on your dick to the point you need a bodyguard."

"Like you did," Isaac pointed out, hands on his hips.

Rainbow blinked, then waved him off. "Look, ask anyone in town, I have a high libido for a pony. And it's been a stressful week." She patted her sloshing belly with a smug sense of pride. "You really took care of all that, though. Mmm, just having all this cum inside me, and having my pussy still tingling from you stretching it out? Beats any of Rarity's fancy spa treatments any day. Plus, knowing that I got early dibs on a real Harem Master? Best. Day. Ever!" She fist-pumped, then chuckled. "But that's me, Rainbow Dash, most awesome pony in Equestria. I promise you, Ponyville - just about everywhere else, really - is a lot more chill. You don't got anything to worry about."

"What about Pinkie Pie?" Isaac asked carefully.

"Oh, you're gonna fuck her next? ...Okay, yeah, she might be a little intense too."

Thankfully, his questions and Rainbow Dash's promises held up - Isaac was able to walk through town once more without being piled upon by horny, **** ponies.

That said, the atmosphere was still _significantly _more sexually charged.

All the townsfolk being some degree of nude didn't help with that. Isaac was practically the only one covering up his crotch - most mares had their pussy exposed and most stallions let their cocks swing freely between their legs. Crotchless clothing or full bottomlessness seemed to be the most common, and some more went topless or fully nude, or just wore some accessories that didn't hide any sensitive parts of their bodies. There were a lot more bare tits swinging, as well as some flat femcolt chests and swollen muscular pecs. And not one pony seemed to mind when they caught Isaac's gaze lingering a little too long.

A lot more ponies were noticing Isaac more than before, as well. Before, he could reliably get through town without so much as making eye contact, since he was a weird alien that few people wanted to interact with. Now? It was like everyone instantly recognized him for the randy, needy male he was, and silent flirting had become as commonplace as a polite smile. Bedroom eyes, waggled eyebrows, licked lips, flashing tops, tit-jiggles, pec-bounces, butt-pats, hip-thrusts - Isaac was getting a crash course on how to non-verbally communicate 'Hey, wanna fuck?' in public.

And yet, despite the almost constant barrage of teases, there wasn't any urgency to any of it. Isaac blushed and kept walking, and everypony just seemed to find it fun that he'd noticed them for a moment before moving along with their day. There was no sense that he'd let someone down or disappointed anyone by not following up on their display of sexual interest - the flirting was just fun by itself to them.

It was inherently strange to Isaac, who was so addicted to porn before being transported here that he was usually focused on cumming above all else the moment he was seriously aroused. For him, being horny was almost more of a burden than something to be enjoyed in itself, something that needed to be relieved post-haste. But there was something... idyllic about how casually sexy Ponyville had become. Thanks to his questions, this had somehow become a world where everyone could be low-key horny all the time without letting it rule them or get in the way. He even saw a few ponies making out and groping each other, and overheard some fucking happening in the alleyways between cottages, and it was all just business as usual for everyone. It was... almost serene how horny it all was.

Of course, all of this also meant that by the time Isaac completed his journey to Sugarcube Corner to look for Pinkie Pie, he was painfully erect in his trousers and raring to go.