Naming body parts
James had just beaten Sirius up after he made a stupid joke, which he does often.
"Jeez!" Sirius said, clutching his neck. "I think you ripped Herman off."
"Who's Herman?" Lily asked, puzzled.
"The mole on my neck," Sirius replied. "What?" he added at Lily's look. "James named his---"
"Sirius!" James said, clearing his throat and blushing.
Remus snorted. "It's a good thing I don't name my body parts."
"Yes you do," Sirius countered. He pulled out a notebook. "It says so in your diary."
"I don't keep a diary, Sirius," Remus replied, narrowing his eyes.
"Then what's this?" Sirius asked, waving the notebook.
Remus looked at the cover. "Sirius…that's your potions notebook."
Sirius flipped through it. "Then why aren't there any notes in it?"
James clapped Sirius on the back. "You don't take notes."
"Oh," Sirius said.