I will not trade pants with others.
"Make sure to slice the caterpillar evenly!" called Professor Slughorn to his Potions class, writing instructions on the chalkboard. "And don't add too much –"
Just then the clock stuck 10:00 and the bells in the bell tower began to sound. Usually, everyone would just ignore this and continue taking notes, seeing as it happens several times a day, every day, but today there was a bit of a disturbance in the class. When the bell rang, Sirius, James, Remus and Peter stood up from their seats, took their pants off, handed them to one another, put whoever's pants they were given on, and sat back down. When the bell rang for the last time, the four boys picked up their quills and returned to their note-taking. Professor Slughorn looked at them and blinked a few times. "Anyway..." he said slowly, turning back to the chalkboard. The four boys didn't even crack a grin.
An hour later, the bells rang again, this time signaling the end of class. While everyone was clearing out, the Marauders once again took off their pants and exchanged them with each other. Slughorn looked on dumbfounded. The boys then gathered their books and left the classroom. "Later, Professor!" called James as though his pants weren't three sizes too wide and six inches too short (he was wearing Peter's pants). Slughorn opened his mouth to either reply or give them a detention, but they were gone. He shook his head and went to his office. He'd give them a detention later; right now, he needed a drink.