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A duck walks into a bar and asks the bartender: “Do you have any bread?”
The bartender responds: “No, we don’t.”
The duck asks again: “Do you have any bread?”… “NO! We do NOT.” responds the bartender, a bit louder.
This doesn’t stop the duck from asking again: “Do YOU have any bread?”
Irritated, the bartender now says: “Look, if you ask me for bread one more time, I’m going to nail your bill to the bar!”…
“Do you have any nails?”, asks the duck.
“No”, says the bartender.
“Good, do you have any bread?”