" The word "lesson" came back to Pooh as one he had heard before somewhere.
"There's a thing called Twy-stymes," he said. "Christopher Robin tried to teach it to me once, but it didn't."
"What didn't?" said Rabbit.
"Didn't what?" said Piglet.
Pooh shook his head.
"I don't know," he said. "It just didn't. What are we talking about?"
"Pooh," said Piglet reproachfully, "haven't you been listening to what Rabbit was saying?"
"I listened, but I had a small piece of fluff in my ear. Could you say it again, please, Rabbit? "

― A.A. Milne , The House at Pooh Corner (Winnie-the-Pooh, #2)