Do you have any grapes?

A duck walks into a bar and asks, "Do you have any grapes?" The bartender says, "No, I am sorry, we have cherries and olives but no grapes." "Oh," says the duck and leaves. Ten minutes later the duck returns and asks the same bartender, "Do you have any grapes?" "Like I said before, we have cherries and olives, but WE DON'T HAVE GRAPES!" says the bartender. "Oh," says the duck and leaves. But ten minutes later the duck returns and again asks, "Do you have any grapes?" "Look, beak lips," screams the bartender. "WE HAVE NO GRAPES!, we will never have NO grapes! and if you ask me again, I am going to nail your webby little feet to the floor!!!" "Oh," says the duck and leaves. Ten minutes later, the door swings open and the duck returns. The bartender is furious. He slams a bottle of beer down on the bar, stares menacingly at the duck and screams, "WHAT???!!" "Uh...uh...do ...you ...have...any....NAILS?" "Nails? Nails? No, we don't have nails," answers the bartender. "Mmmm," says the duck. "So, do you have any grapes?"

-- from that great joke factory in the sky