Sunset Shimmer looked out the window at the beautiful sunset. Then she changed into her purple pajamas. She was just starting to read a book when she heard a knock on the door. She walked over to the door and opened it. On the other side of the door stood Twilight Sparkle, still wearing her blue T-shirt and short, purple shorts she had been wearing all day, and holding some sort of handheld machine in her hand.
"Hi, Twilight."
"Hi, Sunset. I just finished working on a new device that mixes magic and science! And that's not all it mixes."
"What does it do?"
"Unless I miscalculated the magic and science I used for this spell, this device will fuse two people together!"
"Sounds interesting. How does it work?"
"You point it at one person, press this button, and then point it at someone else, and press the button again. I think they have to be pretty close to each other for it to work."
"Is it permanent?"
"I KNOW I got the reversal exactly right!"
"So... Want to test it on us?"
"I thought you'd never ask!"
Twilight pointed the device at herself, pressed the button, and then pointed it at Sunset and pressed the button again.
Both girls were enveloped by a magic light. They moved toward each other... slamming into each other butt-first.
Twilight and Sunset squealed in surprise, as well as a bit of indignity at the way they had collided. Then they realized they had not fused together.
"Okay, I definitely miscalculated something," said Twilight. "I'll have to fix that." She started to walk, but couldn't get very far. She realized her butt was stuck to Sunset's.
"Oh no," said Sunset. "Please don't tell me..."
She tried to walk away from Twilight just as Twilight tried walking away from her. The device had attached their butts with glue, which stretched between them, and then their butts smacked into each other.
"This was a major miscalculation," said Sunset. "Your machine didn't fuse us. It stuck our butts together."
"I bet Pinkie and Sonata would love a device like this," said Twilight. She pointed her device at herself and pressed the button. They tried to walk apart, but again, they barely got far before their butts slapped back together. Twilight pointed the device between them and pressed the button. The result was the same.
"You said the reversal would definitely work."
"I said it would definitely separate us from a fusion. This isn't a fusion. I'm gonna have to go back to my house and figure out how to reverse it."
Suddenly, Twilight felt something resembling a warm breeze on her rear, and a smell entered the room.
"Sunset... did you fart?"
Sunset blushed. "I didn't mean to..."
PPPPPPPFFFFFFFFFT!
Now it was Twilight's turn to blush, and she giggled nervously. "Excuse me..."
Sunset let out another fart, but this one was longer, and far from silent.
BBBBBBBBBRRRRRRRRRRAAAAAAAAP!
Twilight had to admit she liked the extreme vibration of Sunset's fart against her butt.
FFFFFFFFFFRRRRRRRRRRRRRT!
Twilight's fart was higher-pitched, wetter, and just as lengthy as Sunset's latest fart, and Sunset also couldn't deny how much she enjoyed Twilight farting on her this way.
"I don't get it, I'm not usually this gassy," said Twilight.
"Neither am I," said Sunset, pausing to let out a short but loud fart. "And I think I fart more than any of you because I'm a pony."
"It must have been part of the spell. We REALLY need to find a way to reverse this. She started to walk towards the door, but stopped once again. "You'll have to come with me."
"What if someone sees us like this?"
"We'll just stand still to the side and pretend we're looking at something or admiring the sunset."
"And if it's past sunset?"
"It'll be dark."
Twilight took the lead while Sunset walked backwards to go along with her. They walked outside, and down the path to Twilight's house. As they walked, their butts were rubbing against each other. Twilight was only just starting to appreciate that her butt was stuck to the cutest and possibly softest butt in the city. She liked the way it felt when her rear was rubbing against Sunset's.
Sunset also took pleasure in her tush being massaged by Twilight's as they walked.
They farted non-stop along the way. It seemed they wouldn't run out of gas until Twilight found a way to reverse the spell.
They managed to make it to Twilight's house without being seen, or, as far as they knew, their farts being heard.
As they sidestepped to Twilight's table, Spike walked up to them. "How'd it go?"
Twilight farted in response. Spike started to laugh.
"It didn't go as intended," said Sunset.
Spike realized what was going on from the way they were moving. "Your butts are stuck together? That's hilarious!" He laughed even harder when Sunset farted louder than Twilight.
They walked over to the lab room and Twilight examined the device while checking all the information she had. Occasionally she would fart without realizing it, as she often did when she was doing scientific work in her house when only Spike could hear. Although she wouldn't fart nearly as much as she was now.
Sunset, who was farting just as much, was fidgeting a bit. She didn't understand much of what Twilight was muttering, and she was bored. She couldn't wait to be unstuck from Twilight's butt. Or could she? She wasn't deliberately trying to rub her butt against Twilight's at first, but over time, she started to become more aware of how much she liked it, and continued to deliberately do so.
"Ugh," said Twilight after a minute. "It's hard doing this while standing up."
"You can sit down, Twily."
"I can't. Not on a chair, at least."
"You can sit on me. I'll get into the right position."
"Are you sure?"
"Positive."
Sunset got into a position with her rear end in the air. Twilight was now sitting on Sunset's butt as though she was a seat for her.
"Are you all right in that position, Sunny?" said Twilight, wanting to be sure.
Sunset farted loudly and giggled.
Twilight giggled as well, and continued her work. Sunset's butt was like a cushion on a fancy couch and she really loved the position they were in now. It made Twilight even more comfortable when she worked. Sunset also liked being in this position.
After much research and several farts, and a bit of Twilight moving slightly causing her butt to rub against Sunset's, Twilight said "I think I've got it."
They both stood up, and Twilight pointed her device between herself and Sunset and pressed the button.
There was a flash of light. After it faded away, they tried to walk apart, but snapped back and smacked their butts together again. They would have enjoyed this by now if it wasn't for their situation.
"It didn't work," said Sunset. "We're gonna be stuck like this forever."
"I don't understand, I calculated the reversal perfectly."
They paused.
"We're not farting anymore," said Sunset.
"So, that part worked, but what about the rest of it?"
"This seems an awful lot like the magic glue Aria used on... Pinkie and Sonata. Where did you find the magic for this device?"
"I found it in a stone that was in a nearby lake. I tracked it using a device that was designed to find magic that can fuse people together. I must have miscalculated that part because all it does is stick things together."
"That was the same lake where Aria said she found the wand that she used. Maybe some of the wand's magic went into that stone."
"Then that means..."
"All we need is Super Natural Soap."
"Maybe I could put a bit of it into the reversal energy of this device and it could separate us! Problem is... I don't have any."
"I do. Rarity got some for me, and I'll be using it from now on."
"So we have to go back to your house."
It was nighttime already by the time they stepped outside. This time Sunset was in the lead, and she ran, Twilight running backwards as fast as she could. Their butts were grinding together harder than ever. Now that they weren't going to be stuck for much longer they could enjoy how this felt. They also missed farting on each other.
Once they were at Sunset's house, Sunset took her bottle of soap, and Twilight squirted a bit onto her finger, opened her device, and rubbed the soap onto a part of it. Then she closed her device, pointed it between them, and pressed the button.
Another flash of light enveloped them, and disappeared. They walked apart, expecting their butts to smack back together again, but they didn't. Twilight's device had worked.
Twilight and Sunset hugged each other.
"Now that we know how to reverse it, that was rather enjoyable," said Twilight.
"Can we do it again?" said Sunset.
Twilight used her device to stick their butts again. They rubbed their butts as vigorously as they could, and before long they were farting again. They giggled at how funny they thought it was.
"I get the butt sticking, because you were using magic from that magic glue wand, but how did a machine intended for fusion end up making us fart?" said Sunset.
"Probably an unforeseen side effect of what I used to make it," said Twilight. "That, or I miscalculated something pretty bad."
"Pinkie Pie and Sonata would love this device." BBBBBBRRRRRRRRRRT!
"I should make another one for them!"
"Can you do that?"
"Figuring it out was the hard part. I can make another one of these easily." PPPPRRRRRRRRT!