My Favorite Joke in the Whole World

A duck walks into a feed store.
He goes up to the manager and asks him,
"Got any fish?"
The manager says,
"No, this is a feed store for cattle and horses and such."
So the duck goes away.
The duck comes back the next day and asks,
"Got any fish?"
The manager says,
"No, I do not have any fish."
So the duck leaves again, and he comes back the next day.
He asks the manager,
"Got any fish?"
The manager says,
"No, and if you ask me that one more time, I'll nail your little, webbed feet to the floor!"
So the duck walks into the feed store on the fourth day and asks,
"Got any nails?"
The manager says, "No..."
"Got any fish?"
:)