As a young filly still living with her parents in Canterlot, Twilight Sparkle first discovers how much fun it is to hold in her pee as long as she can.

Is the male erect penis a symbol of power and dominance? A colt seems to think so in a more literal way, and a bat mare is interested for what's in store.

Titacular Princess Luna walks right into a challenge tasked by her dearest sister Princess Celestia. Will Luna be able to triumph and beat her sister's stone-headed challenge? Or will she fall victim to one the most basic of bodily functions...

Rainbow Dash tries her absolute best to fight her bladder to the very end and hold it in as long as she can. She can't get enough of it, and it soon becomes her new favorite hobby.

Limestone Pie gets more than she asked for in a stubborn, controlling attempt to boss over her bladder as much as she pleases.

Alicorn Twilight Sparkle is tasked by Princess Celestia to hold in her pee for an entire week. Unbeknownst to her, this will end up being only the beginning of her full bladder-centered adventure.

(Anthro) A sexist clopfic originally designed for my own personal satisfaction. Join a horribly developed OC named Sparkling Star and her adventures in the cloppy wonderland of Equestria. Contains Watersports fetish to some extent, and titty fetish.