There's a WHATquestria?!

In the calm, quiet town of Ponyville, for once in a long, long time, nothing horrible was happening. No cat-eyed dragonesses were smothering the people and breaking down the buildings with their mountainous mammaries. No witches had brought a curse of eternally swollen milky udders to Equestria. Pinkie Pie hadn't even accidentally sat on some random bystanders' face during her acrobatic antics and had to make any embarrassed, hour-long apologies, nor pay any hospital bills.

The sun, just as big as it should be, just as round as it should be, just as jiggly as it should be, which is to say not really at all, looked calmly over the sprawling land of Tittyquestria and shone through the stained-glass windows of a gaudy crystal palace towering over the meager thatched-roof cottages and occasional villas of Ponyville.

And deep within, Twilight Sparkle lay on her back in bed, sleepily whinnying, her mouth wide in a drooly grin, as the sun gently attempted to coax her awake through her curtains.

But it would have to try a bit harder, for Twilight Sparkle never had a lazy day - she wouldn't stand for it - and had tired herself out by the previous evening.

She had spent that lovely, free day giving herself and everyone she knew all kinds of things to do. She'd enchanted every inch of her floor with a warmth spell. She'd helped Pinkie Pie root out a kitchen that used mares' milk instead of cows' milk. She and Fluttershy had taught each other some new words they'd never use, like "planate".

"Mmm," she mumbled, shifting uncomfortably. "Rrrgh," she winced, rolling in her sleep. Deep inside her sleepy little pony brain, her dreams of transforming Equestria into a milky white future-tit-topia were cast aside by a massive equid shadow, like a circus stilts pony. The buildings crumbled silently on touch as it slowly, steadily crept after her, even as she fled. It gradually sped up in pursuit. Soon enough, it reached her, and at its touch, she was sucked tumbling into its shadows.

She saw herself falling towards her. Was it a mirror? She crashed through it silently and was startled awake with a gasp, staring at her ceiling.

She blinked, sweating, catching her breath. Just a bad dream, she assured herself, and rapidly began to take in her bedroom to wipe it from her memory. Spike must not be up yet, she considered. I don't hear him fapping in the bathroom. Either that or he's already done. What time is it? She stretched and hopped out of bed, overdoing it and stumbling, falling onto her face.

"Oof!" She rose unsteadily to her hooves. That's weird, she thought. I feel light as a feather for some reason. And my tits don't even hurt from that fall. She yawned and walked past her mirror, giving a drowsy nod to her reflection and turning away.

She froze halfway to the door, her dopey smile falling.

She ran back to the mirror and stared. Her mouth fell open and her face paled.

Ringringring! went five butts somewhere in Ponyville.

Twilight sat flummoxed at the table, looking around at her friends. Specifically, at their undercarriages of varying size, with Fluttershy and Pinkie bashfully trying to hide theirs behind the edge of the Map. This can't be good, she fretted. There must be some kind of boob-stealing demon. Maybe Luna became Nightmare Boob again.

"Do you mind?!" Pinkie shrieked, leaning her front half onto the table with a red face to obscure her modesty.

"Rude, Twilight," Spike admonished, standing at her side with an eyebrow raised. Hm, he clearly hasn't blown recently, Twilight critiqued, a hoof to her chin as she very clearly and openly examined his enormous balls. But then he should be in the next room over stroking himself like crazy. He's fully sheathed and everything. She blinked in confusion as Spike gave her a super uncomfortable look and moved closer to the Map to obscure himself from around the neck down.

"I see Fluttershy, Pinkie, and Spike haven't been affected anatomically," Twilight failed to explain. "Rarity seems to be partially-intact. But three of us have obviously been... adulterated!"

"Adulterwut," Applejack furrowed her brows like Twilight had just started speaking in fancy.

"What're you talking about, Twi," Rainbow Dash scoffed with a scowl, her forelegs crossed.

"Applejack, Rainbow Dash!" Twilight retorted, incredulous. "Do you mean you haven't noticed that you're flat as a board down there?!"

Applejack's face blossomed into a furious blush. "P-pardon you..?!"

Dash's face paled and she wilted. "W-wow, way to rub it in..!" she sniffled. "I-I mean we can't all be Uddershy and Pinkcow Pie..."

The named mares' eyes went wide and they adjusted their positions to try to minimize the presence of their undercarriages.

"But that's just it, Rainbow Dash!" Twilight cried. She leapt up, shoved her butt backwards, and slapped the table with both hooves. "You're supposed to be as huge as Fluttershy and Pinkie! We all are! Rarity should have poked herself with one of her needles by now like a pair of big jiggly black pincushions! Spike's still got his fat low-hanging cantaloupes but even though his nuts should be ready to burst he's clearly not hiding somewhere pawing off to us, in fact his cock isn't even peeking out of his sheath and that must be because four of us have lost our giant boobs!!"

Five mares and a dragon stared at her white-faced and absolutely appalled. She facehoofed in sudden realization and dawning embarrassment.

"... The name of this country isn't 'Tittyquestria', is it..." she realized, sinking back into her chair and planting her face on the Map.

"Th-th-they're not that b-b-black," Rarity objected, blushing bright red and sewing rapidly.

"Whatquestria?!" Applejack bellowed. "Are you outta yer mind?!"

"I-I'm feelin' a d-d-dooozy comin' on," Pinkie warned, her body shuddering.

"J-just the opposite! I can explain," Twilight thought she could. She opened her mouth and then paused. Applejack, did you ask me to kick you in the tits a bunch yesterday? would not have been a good direction to take the topic. "Pinkie!" she pointed. "Tell me the truth! Did your titties feel funny on the way over here?"

"E-e-e-excusey-yoosey-that-was-the-doozy?!" Pinkie shrieked, her hair exploding out like lightning bolts and then deflating into Pinkamena hair as she retained her shocked, hooves-on-face pose.

Twilight closed her eyes, sighed, and tried again. "Pinkie, sweetheart, did your Pinkie Sense warn you of anything on the way here."

"Y... well yes," Pinkie glanced all around in embarrassment, "And well... maybe it might've... warned me of interdimensional stuff..." She lowered her voice to a bashful whisper. "... in my boobs 'n' poopin' parts..."

"Right! Interdimensional!" Twilight slapped the table again without getting up. She hissed with wide eyes, looked down for a few beats, sighed in relief, then glared out at them again. "I'm not your Twilight!"

"W-well I'll say," Applejack condemned, her forelegs crossed and her hat tugged over her eyes. "I ain't never felt so disrespected by a pony I cared so much 'bout, even when you were fresh outta Canterlot."

Twilight couldn't help but feel terrible for upsetting them, but her anxiety won out. "No, I mean, I've switched bodies with your Twilight!" she insisted. "And I gotta say, while her tits are kinda pathetic, I like the mobility," Twilight finished, twisting herself around and stretching. "You girls must have no idea how frustrating it is to carry big ol' water-balloons under your belly all day. Well, except Pinkie and Fluttershy, I guess."

"It's fine when no one calls it out," Pinkie rasped, having somehow compressed herself into a ball like a hedgehog, glaring at Twilight with angry hedgehog eyes.

"Yes..." Fluttershy mumbled, attempting to do the same with much less success and a far gentler expression.

"Rrrr-a-hem-hem, Twilight, darling," Rarity awkwardly cleared her throat. "Do you mean to tell me... That our Twilight has... switched bodies with another Twilight... that of course being you... and you are from this... Er, as you said..."

"Tittyquestria," Twilight nodded.

"I don't think Twilight could make this up, Rarity," Rainbow Dash offered uncomfortably. "This is pretty far out of her comfort zone."

"Ya think!" Applejack squirmed. "Twi shies inta a corner ev'ry time a passin' stallion glances at 'er 'n' now all-a-the sudden she's talkin' all this titty moonshine!"

"Hey, wait a minute!!" Dash suddenly jumped up, outraged. "Didn't you say we were all supposed to be gigantic? Like, even me?!" Rainbow Dash roared. "My tits're big as Fluttershy's giant friggin' goat udders?!"

Fluttershy meeped and made a much better effort of the hedgehog thing.

"Yes!" Twilight confirmed. "You're a little shorter than us, though, so you almost never touch ground, because you chafe your nipples on the dirt..."

"Wha --" Dash sat back down and blushed. "Daffodil, that's huge... Can I still do a Rainboom, though," Dash asked, now scowling with one eyebrow raised. "I'd think with that kind of extra appendage I'd have a little trouble doing a Rainboom..."

"A Rainboob, you mean?" Twilight clarified casually.

"Yeah, that's what I --" Dash started choking. "What! Did you just say 'Rainboob'?!"

"Yes! A Rainboob!" Twilight blinked, like Dash was the unreasonable one. "Honestly, I've no idea how you manage to make it up to Mach 1 without your tits coming off, let alone smacking the sound barrier with them to break it..."

"I do -- I -- what," Rainbow Dash rasped. "That's amazing and horrible." She hid her face and stopped talking.

"And Applejack --"

"Shut it!" Applejack commanded from behind her hat. "You finish that sentence, yer mouth 'bout to be on th' back o' yer head afer you can say 'hot diggity dog'."

"Yo," Starlight opened the door and walked into the room, "What's this about all of us having big ol' honkers? I wouldn't mind an upgrade myself." Twilight took the time to check her undercarriage. Huh, she considered. Around Rarity's level. Well, at least four of us are armed...

Spike inhaled and sighed, his face red. "Twilight has switched consciousnesses with another Twilight from an Equestria where all the girls are... blessed."

"Oh don't sound so unenthused," Twilight waved him off. "You can't go two days without painting the bathroom white over us." Spike fled around the table to stand next to Rarity, covering his face with both hands as she winced in sympathy.

"Did you just --" Starlight blinked several times, then nodded with a grimace. "... Yep, definitely not our Twilight," she accepted. "Our Twilight told me every time Rarity bats her lashes she looks like a scarlet mare."

Rarity spun her head around. "She said what --"

"So what's this place called, again," Starlight continued. "Sexquestria? Hornyquestria? Spike's-harem-questria?"

"Tittyquestria," came the deadpan drone from the others and informative chirp from Twilight.

"Lest, a bit on the nose, isn't it? But I have an excellent idea," Starlight nodded, smiling. "How about we get you back home as soon as possible." She was now scowling.

"Oh my, would you?" Twilight asked hopefully, not catching onto her tone. "Are you as familiar with dark magic as my Starlight?"

Starlight leaned back warily. "... that depends," she ventured. "What kind of shine does she get into?"

"She found a way to hot-swap our tits. Like, if I had Rarity's, and I... I dunno, I burned 'em on a hot oven, Rarity would shriek, not me."

Rarity fainted on the spot, falling directly between Applejack and Spike and onto the floor with a clunk. "... why didn't anyone catch me..." she complained after a pause.

"Oh, yeah, yeah, I can totally match that," Starlight waved off with eyes that said Luna's cunt hairs, no. "And if you can stop talking about him jerking off for two seconds, Spike can probably help, too."

"What? Your Spike's useful?!"

An hour later, Twilight gave one of her trademark frustrated groan-sighs and flopped down onto the floor of the library, in front of the impromptu mirror they were working on.

There was an awkward pause. "Hey," Twilight chirped brightly. "My tits don't hurt!"

"... Uh, should they?" Starlight blinked, looking up from a grimoire. "Do, um, do they even touch the ground when you drop like that?"

"Mine do," Twilight bristled indignantly. "Heck, they touch the ground when I'm standing up! Normally when I collapse like that you hear a super loud slap and then me screaming... Leaves a crack in the floor, even. Does this floor feel a little cold to you?"

Starlight stared with her mouth open for a few seconds, then nodded with a grimace and returned to her grimoire. "Yeah, pretty cold," she managed.

"Lean down, put your boobs on it," Twilight suggested, getting to her feet with a bit of a hop. "Holy smokes, this girl is so limber..!" She started hopping around in circles.

"Twilight? Limber?" Spike doubted, his face green with discomfort.

"You want me to press my boobs onto the floor," Starlight repeated. "Why."

Twilight stopped hopping to smile back at her. "Humor me!"

"Fine," Starlight sighed, awkwardly lowering herself with a blush. Immediately upon pressing her body against the floor, she hissed and jumped up. "Celestia's wobblers, that is so cold! Why did I let you make me do that!"

"I know, right?!" Twilight gestured with a hoof. "She should really put a warming spell on the place."

"We'll pass it on to her," Spike promised.

Starlight nodded, her nose wrinkled, and returned to her grimoire.