Can't remember where I heard this
A chicken walks into a library and struts up to the counter. Very emphatically, it clucks 'Bok'. So the librarian gives it a book and it walks out.
Shortly later it returns with the book in its beak and throws it back on the counter. Even more fiercely, it says 'Bok bok'. So the librarian gives it two more books and it walks out again.
But soon it's back with the books, throws them at the librarian and clucks 'Bok bok bok'. The librarian gives it three more books and it leaves. But this time the librarian is getting curious and follows the chicken out.
He sees it strut down the road with the books in its beak until it comes to a pond. In the middle of the pond is a frog, sitting on a lily pad. And the chicken throws the books to the frog, saying 'Bok, bok, bok'. And the frog chucks them back, saying 'Read it, read it, read it'.
( flatfrog Staring vacantly into space, Fri 6 Mar 2009, 9:34, 2 replies)

It was
Stephen Fry on QI the other friday/saturday
(stubbledchin, Fri 6 Mar 2009, 9:57, closed)

No
It was a long time before that - but there you go, the classics keep on coming back...
( flatfrog Staring vacantly into space, Fri 6 Mar 2009, 12:03, closed)