It gets insanely itchy

Suddenly, Erza/Juvia felt a burning sensation inside her butt and began scratching it like crazy. Strangely, the itching wouldn't stop no matter how much she scratched. This did not go unnoticed by an observing Lucy.

"Juvia, why are you scratching your butt?" Lucy asked confusedly.

"It feels like it's on fire. What kind of toilet paper did you buy?!" Erza/Juvia yelled as she continued to scratch her butt crack. Lucy then took a closer look at the package and blushed shamelessly. "Oh, this isn't good." Lucy commented.

"What's wrong?!" Erza/Juvia asked as she started scooting her butt on the carpet. "Well, Juvia..."