A chicken goes into a library, goes up to the librarian and says: "Book."
"Ah?" thinks the librarian. "A chicken wants a book?" She pushes a book over the counter to the chicken, who tucks it under one wing and goes out.
An hour later the chicken is back, pushes the book over the counter with its beak and says to the librarian: "Book book." The librarian gives it two books. It tucks one under each wing and heads off again.
Two hours later the chicken comes back, gives her back the two books and says: "Bookbookbookbookbookbookbook...bookbookbookbookbook" So the librarian gives it a whole pile of books. The chicken balances the books on its back between its wings and goes away.
At the end of the afternoon, the chicken comes back with all the books and returns them to the librarian. She's very surprised. "Hey," she says, "for a chicken you certainly get through a lot of books."
"Oh," says the chicken, "they're not for me. I've been getting them for my friend, the frog. But every time I give him a book he says: 'Read it. Read it. Read it. Read it."