"Now, class, this is amortentia. Does everyone notice its distinctive scent? What kind of aromas do you detect?" Slughorn pointed toward a large cauldron in the center of the classroom, and Hermione and the others crowded around to take curious sniffs.
"A distinct scent of old books, fresh grass, and... toothpaste," Hermione said after inhaling carefully, looking as though she were trying to figure out why on earth she could smell toothpaste.
Suddenly, two knocks echoed through the air as Professor McGonagall shoved Harry and Ron into the Potions classroom. They looked rather sheepish, staring down at their empty hands. "Apologies, Professor Slughorn. May we join this class as well?"
Chapter 110