It's hard being a nerdy pamper pony on campus. It makes you easy pickings for all types of bullies. Jordan thought that going to the library late at night would be good way to get some studying in while avoiding their bullies. But even in the dead of night, there will always be somepony rearing to make fun of the big foal on campus.
A spell slung from behind a bookcase and then POOF! They're stuck in a thicker diaper and a much shorter skirt! Now they're forced to waddle back out with their poofy diaper on display. Enduring the humiliating taunting all the way back to their dorm.