Learning and Yearning

Applejack wasn't kidding when she said there was a heat wave, the journey on the bus left them all sweating and constantly drinking from the bottles of water that they had in their bags, they were practically panting like dogs. Eventually the bus came to a stop and all of the girls got off the bus as fast as they could into the gentle but ever-present and cool breeze that blew through the wide open spaces of Sweet Apple Acres.

Sunset Shimmer took in a deep breath through her nose and let out a satisfied sigh "I know I say it every time, but this place just reminds me of home". When Twilight got off the bus and, for the sake of curiosity, mimicked Sunset's actions, she did have to admit the farm was the only thing that really came close to being a little slice of Ponyville in the human world.

Applejack opened the gate that led to her home and said "Alright y'all, you ready for some horse ridin'?" The girls all cheered, Applejack laughed and said "Alright alright, come on then". Applejack led them all to the barn, inside were about eight horses, five stallions and three mares. "Alright y'all, take your pick, but remember you can't ride big ol' Vanta over there", when Twilight looked over to where this so-called "Vanta" was, she saw a big stallion with a shiny black coat and mane, the unfortunate side affect of seeing this particular horse was that when her pony brain registered the sight of what was clearly a very virile stallion, it sent signals to the rest of her body that kicked her reproductive organs into overdrive, immediately beginning the heat that would get her pussy primed and make her fertile.

Twilight blushed as she felt a burning sensation build and rise in her groin "Um... why can't any of you ride Vanta?"

Applejack said "Well first reason bein' that he's the horse you're gonna be studyin'" she said, then continued by saying "Second reason bein' that while you can technically ride 'em, breeding stallions aren't really meant for ridin' purposes". Hearing that he was a stallion specifically bred to impregnate mares didn't help matters, she hoped that the others would chalk up her sweating down to the heat of the sun rather than the heat in her crotch. Twilight decided that she would at try to make a casual attempt to study a different horse, she was afraid her hormones might distract her and disrupt the data, that plus the scent inside the barn was sending tingles of pleasure up her spine and she didn't want to admit that the smell of these beasts was making her aroused, horny, subconsciously begging to be fucked at all costs.

"Um... If he's a breeding horse, wouldn't one of the mares need to stay here?"

Unfortunately for Twilight, Applejack said "Nah, no need. None of them have started their estrus cycle yet, that is to say that they aren't in season, so matin' wouldn't really be practical". Twilight was in heat but these horses WEREN'T?! The lucky bitches. Seeing no alternative, she decided she would just have to study Vanta and hope the chemical reactions in her brain didn't affect her memory or her study methods, she was here for information only after all. After that, every girl chose a horse and gently trotted off into the field for a relaxing horse ride, leaving just Twilight and Vanta there in the barn.

Twilight nervously approached Vanta, cleared her throat and focused on the one thing she was there for, the quest for knowledge. She began to take note of the various differences between the ponies of Equestria and the horses of the human world, for one thing their legs got slimmer towards the hooves, not thicker. The muzzle was much longer and everything was overall much larger, including the genitalia, wait... the genitalia?! Through all of Twilight's mental notes, she hadn't noticed Vanta's cock slipping out of it's sheathe in front of his big swinging balls. Vanta was sniffing at Twilight, eagerly drinking in her scent, it was then that Twilight realized the predicament she was now currently in. She was in a heat and a very strong heat at that, but because she was still a pony on the inside, Vanta didn't particularly care what she looked like, all he could register was that there was a thick layer of "I'm a mare, please fuck me" hormones surrounding Twilight and his body was responding, by becoming more and more erect by the second.

Twilight wasn't faring much better, she seemed hypnotized by the mass of stiff stallion cock in front of her, her body and her brain were urging her to simply leap at the thing and do everything she could to please it while they were still alone, still had the chance, the girls wouldn't be out there riding horses forever. Twilight shook her head rapidly, she had to come to her senses and continue her pursuit of simple and pure facts, not to became abnormally interesting in the junk of handsome stallion. Though she did have to say that even being aware that horses were overall larger in every aspect, she could see why he was a perfect breeding stallion. His cock was long and turgid, his nuts were practically churning, as if the huge cum factories were already preparing several loads for the next mare they would have the pleasure of filling, he was also certainly quite muscular, she could only imagine how well he could thrusts with strong well toned hips like that. Holy fuck he was hot.

Twilight bit her lip and looked to the barn entrance, which was now closed. They had only started riding 5 minutes ago... surely she could indulge herself just a little bit, just to satiate her lust... for answers! Answers to questions that had to be asked! Like if interacting with Vanta on a semi-physical level would help her quench her heat or exacerbate the situation and simply magnify the voice in her head that was just screaming the words "FUCK HIM" at her. I mean, where was the harm in that? All she was doing was examining things, it was totally justifiable, even if she moaned out loud as she pressed her face into his hot sweaty nut sack, taking in deep breaths of his extremely attractive scent and taking long licks of his rough salty stallion scrotum. OK, she was only kidding herself at this point and the point she was at was the point of no return, she had started after all, so she might as well finish!