Author's Notes:

This one will be less fetishy than his usual requests, aside from the farts, and probably lower quality too.

And note that this one is human versions that aren't Equestria Girls. The requestor said a deviantart user gave him permission to request a scat story based around his designs, which might be the basis for parts of this request, but I don't really know much about said user.

It was summer, and Twilight Sparkle and Pinkie Pie were taking a break from their usual work. They were spending some quality time together and going for a walk in the park.

Twilight was wearing an orange shirt and grey shorts, and Pinkie was wearing a pink shirt and a blue skirt.

They walked through the park, discussing things that happened in the previous school year.

After about an hour, Pinkie Pie suddenly farted.

PPPPPPFFFFFFFFFT!

It was a high-pitched fart. No one was around to hear her fart besides Twilight, and so they both laughed.

Then Twilight lifted her leg and let out a wetter fart, which caused her panties to get a little wet. She blushed lightly.

Pinkie giggled at Twilight's fart. "My turn!" She stuck her butt out slightly and released a loud fart that otherwise sounded like a standard everyday fart. Pinkie blushed, knowing this sound came from her, and smiled in embarrassment, giggling nervously.

They had fun farting for a few minutes, during which their farts became wetter and stinkier.

"This is going to be..." FRRRRRRT! "...more than a fart soon," said Twilight.

"We gotta find a place to go, fast!" said Pinkie.

They ran through the park in search of an outhouse. As they ran, they let out a few dirty farts, making their panties a little wetter and smellier.

Eventually they found two portable toilets. Twilight sighed in relief; She still had to go badly, but she knew she would get her relief soon.

Their relief went away as soon as they saw the notes on the doors, saying they were both out of order.

"What are we gonna do?" said Pinkie, barely able to keep from making a mess in her panties. "Is there anywhere we can release the beast from our stomachs?"

Twilight groaned and let out another wet fart. "Looks like we'll have to go behind the bushes."

Fortunately, the park was built near the woods, so there was a good chance that they could find some privacy there.

Twilight and Pinkie ran into the forest, farting a few times as they did. Once they were sure they were far enough, Twilight and Pinkie walked behind trees on the opposite sides of the path, feeling like they were about to burst.

Twilight pulled down her shorts and purple panties, squatted down, and let go. Diarrhea exploded out of her butt, along with several sloppy wet farts. She groaned at this projectile diarrhea that was making a big mess under her, but she was starting to feel more relieved.

Pinkie pulled down her panties, hiked up her skirt, and released a large amount of hyperscat, which began piling up rapidly on the ground. She sighed in relief and giggled when the occasional fart made its way out of her.

Both Twilight and Pinkie had to put up with a very unpleasant smell, but they ignored it because they knew they were going to leave soon anyways. They didn't want to stay too long unless it was necessary.

Once they were done, Twilight wiped herself with a leaf, while Pinkie wiped her butt on the grass. Once they were sure they were clean enough, they pulled their panties and, in Twilight's case, shorts back up, and walked back onto the path. They giggled at each other, feeling that their hands were dirtier.

They walked over to Twilight's house for a slumber party.