Original Description:

“Breaking wind is unbecoming of a princess. Or, so Twilight believes.

Once a mare willing to blow her flank like a horn, even if just around her closest friends, Twilight has started to become more shy about her natural emissions, and Rainbow and Pinkie set out to remind her that everypony farts.”

This one came to me in a dream. There was going to be a scene where Rainbow takes Twilight to a fancy pancake restaurant since Pancakes give Twilight gas (that was part of the dream), but I never got around to writing it.

Twifarts

They sat on the steps of the looming castle as Twilight's belly grumbled.

"Come on, Twilight. You can fart around us. We won't judge you. Trust me," Rainbow insisted.

Twilight sighed and nodded, assured by her friend's words. She stood up. A few sputtering noises escaped her flank, building to a sharp three-second fart.

Rainbow smiled. "Thank you."

Twilight sighed.

Twilight And The Princesses

Twilight lowered her head. "I don't know. Maybe I'm not princess material after all."

After a few seconds of silence, a raunchy toot sounded through the air.

Twilight looked up, knowing that noise didn't come from her plot, only to see Celestia with her left back leg hiked up in a farting position.

Twilight was flabbergasted, deciding to sniff the air and... oh, yep, it was nasty. Twilight couldn't believe her mentor and the princess of the sun just ripped one in front of her like that.

Luna followed suit, blasting a staunch ripper of her own, and Cadende, whose fart was surprisingly musical.

"I... I don't understand. I thought farting was upprinesslike!"

Celestia chuckled. "Well... according to who? Who has say over the Princesses?"

Twilight thought on it for a second.

"You see, Twilight," Celestia continued, "you might think you need to be perfectly strict and couth all the time as a princess, but that couldn't be further from the truth. You're royalty, Twilight, and as royalty, well..."

"Social rules don't apply to you," Luna chimed in. "You can just..." Luna lifted her hind leg and let a quacking tuba of a fart escape her rear, "Cut loose! After all... who’s going to stop you?"

Cadence chuckled. “It’s actually a really freeing experience. Just blasting wind in crowds of thousands and being able to take full credit for it while still demanding to be treated like royalty... it’s great.”

“Especially when you're with other royalty. We’ve never told you this, but... us Princesses do have a night every now and again where we just sit around and let our every bodily function go wild,” Luna said.

“Yep,” Cadence chimes back in. “We burp, we sneeze, we snort, and we fart. Oh mare, do we ever FART.”

Celestia wrapped a wing around Twilight. “Twilight. Never be ashamed of your natural self.”