CONTENT WARNINGS FOR THIS CHAPTER: Scat, Watersports, Farting, Vomit/Puke Play, Semi-Public, Shameless Relief, Shameless Masturbation

"You do what in Ponyville?" Starlight balked as she heard Twilight's explanation as to why there was a large turd sitting in the middle of the castle's map room. "Just, anywhere?"

The purple alicorn nodded enthusiastically. "Yep! Just squat and go! Anywhere and everywhere!" As if to prove a point, a long, rancid fart burst forth out of her rear followed by a torrent of wet fecal slop. Her diarrhea plopped onto the floor, splattering her hind legs with droplets of shit. "Ahhhhh..." she sighed, completely oblivious to Starlight's shocked face.

"I... I think I'm going to hurl," Starlight mumbled, fighting to keep her breakfast down as she watched her new friend take a messy dump right in front of her. The grotesque smell of Twilight's farting didn't help in that endeavor.

"Oh don't be dramatic," Twilight groaned as a bubbly fart punctuated a few solid pieces of her bowel movement. "It's - unf - a perfectly natural thing to do!"

The smell of her disgusting display wafted up, and Starlight took a step back, covering her nose with a hoof. "Oh fuck, Twilight!" she said. "That smells terrible!"

Twilight paused to take a generous sniff of the air around her. "I actually like the scent," she responded, before blushing a bit. "It's actually quite... pleasing, if you know what I mean."

"Are you kidding me?" Starlight asked, somehow finding herself even more surprised by the minute. Randomly learning of a Princess' obscure fetish somehow overpowered the shock of actually watching the alicorn take a shit in front of her. "You're a carpophile?"

The alicorn squatted down slightly, pushing on her rectum to clear the rest of her colon out. "It's coprophile, actually," she corrected as a thin rope of semi-solid poop coiled its way out of her rear. "And yeah. Lots of ponies are around here." She looked up to meet Starlight's gaze as a wet, squeaky fart slipped out after the last of her shit. "It must be something in the soil," she joked with a smile before she relaxed her bladder.

Starlight thought she was going to lose it as she watched Twilight wantonly piss onto the floor. "This can't be real," she whispered to herself. "This is some elaborate prank by that weird chaos god they told me about."

One again demonstrating her previous point, Twilight reached down with a forehoof to fiddle with her pussy as she continued to spray out urine on top of her wet shit. "Nope," she said through a soft moan. "We're all just really horny for this shit." There was a pause before she giggled at her own pun.

Twilight's pee stream gradually tapered off as she idly masturbated, keeping her gaze on Starlight. A growing puddle of pee began to spread out around the soft logs, and Starlight watched in disgust as the stream tapered off and Twilight righted herself back up.

The alicorn took a few steps off to the side, careful to avoid her mess, then turned back around to face her rear towards Starlight. Her tail was lifted unabashedly, and the unicorn found herself face-to-flank with her friend's private bits. A few drops of yellow pee clung to Twilight's pussy lips, and a clump of mushy, wet manure caked the wrinkled folds of her pucker and the surrounding fur on her ass.

The unicorn shook her head. This whole scene was getting to be too much for her. She walked away "This can't be real. I'm going to go find a bathro-" Starlight froze as her hoof sunk into something warm and wet. A nauseating feeling grew in her stomach as she forced herself to look down to confirm her fears. A quick glance did indeed inform her that her front hoof hand landed smack dab in the middle of Twilight's manure.

This time, Starlight did in fact, hurl. A horrible retching noise erupted from her throat as her body heaved. A deluge of warm vomit flooded out of her mouth and nose as she retched, splattering onto the floor in force. Chunks of half-digested food mingled with the pile of shit on the floor, and the horrid smell of her bile mixed with the fetid stench of Twilight's wet dung. Starlight shuddered, her body jerking as a second wave of puke forced its way up and out of her mouth, joining the growing puddle in front of her.

Coughing followed the second hurl, as Starlight did her best to clear the lingering fluids that were in her throat. She took a weak step forward, and immediately regretted her decision to move as her hoof slipped out from underneath her and she collapsed into the pile of filth below her. The slick mixture of fluids found her sitting on her flanks, her forelegs braced behind her to keep her from falling down completely. The warmth seeped into her fur, and before she knew it, another wave of nausea burst forth.

A disgusted yelp precluded yet another retch and a surge of vomit spilled out of her open maw. The angle of her body forced the slick spew to fall onto her upturned chest and stomach, coating her front in her own stomach slime. The thick, chunky mixture matted down her fur, the most liquid of the goo dribbling down her body to the floor, while the viscous mush clung to her pale pink fur.

Starlight took a deep breath, coughing and lightly retching as she struggled to collect herself. Her throat burned from the acid that had forced its way up, and the vile aftertaste of her previous meals stewed in her mouth as she panted for breath. Gradually, she became more and more aware of the warm, chunky soup she was sitting in, and prepared herself for another wave of violent nausea.

But it never came.

Instead, as Starlight's head slowly cleared, a strange, unfamiliar feeling seemed to spread its way up her body from her flanks. The warm puddle of sick soon transformed into a warm puddle of something else as the mare realized that she was beginning to get aroused.

Confusion struck her. This was supposed to be gross. This was gross. But it was also kind of hot? Starlight's mind went back to Twilight's earlier words: "It's actually quite... pleasing." She hadn't understood what the alicorn had meant. But now, as she sat here in a puddle of urine, wet poop, and her own vomit, her marehood started to leak... Starlight was beginning to understand.

A wet clopping noise pulled her attention away from the grotesquely alluring feeling stirring in her loins, and she turned to see Twilight just a few feet away, leaning back with her hind legs spread and rubbing at her soaked pussy with wild fervor. Her soft moans could barely be heard above the noise as she eagerly masturbated to the sight of the puke-covered unicorn before her. The wet cunt was pointed right at Starlight, and she could see the marehood quivering with each rapid movement of the alicorn's hoof.

So it wasn't much of a surprise when a shower of marecum squirted out of the purple pony's cunt and doused Starlight in the lusty fluids. Twilight let out a long moan as she came, squirting everywhere in a wide arc. Starlight's mane was drenched by the spurts, and the mare juice ran in rivulets down her fur, only to puddle with the vomit beneath her.

All of this combined to increase the stirring feeling in her chest and loins, leaving her very confused, and slightly aroused. She sat there silently, contemplating her feelings and existence as Twilight came down from her orgasmic high. She felt the other mare watching her as she sat in the pool of bodily fluids.

"Starlight?" Twilight asked tentatively, looking at the fallen mare.

"Yeah, Twilight?" the unicorn replied, her voice hoarse and raspy.

"Uh, are you okay?"

Starlight swallowed thickly, attempting to process everything that had just happened. "I- I really don't know." A violet aura surrounded her, and the unicorn found herself being lifted up and out of the pool of shit and sick.

"Why don't we get you to a bath," Twilight suggested softly. "We can talk more about what just happened when you're clean. And... I'm sorry about... well all of this, really."

Starlight just nodded in reply as she floated down the hallway. She had no idea what had just happened, and could not wait to get the sticky, slimy gunk out of her coat - no matter what it made her feel. As they approached the washroom, Starlight finally spoke up. "Twilight," she said quietly, almost too quiet for the alicorn to hear her. "I think I understand the fetish thing now."

Author's Note

We can check puke off the list. Any weird or preferably even grosser ideas, feel free to let me know! They do need to be mostly bathroom-centric though, because that's the theme of this story.