A duck walks into a bar and says to the bartender, “I’d like to buy some peanuts.” The bartender says, “Sorry, don’t sell peanuts.” The duck leaves.

The next day, the duck returns and again says, “I want to buy some peanuts.” The bartender replies, a bit gruffly this time, “I already told you I don’t sell peanuts.” The duck leaves.

The next day, the duck comes in once again and yet again demands, “I want to buy some peanuts!” The outraged bartender yells back, “I told you, I don’t sell peanuts! If you ask one more time, I’ll nail you to the wall!” The duck leaves.

The next day, the duck walks into the bar and before the bartender can say a word, the duck asks, “Do you have any nails?” The bartender looks taken aback and says quietly, “Sorry, don’t have nails.” The duck asks, “Well then, do you have any peanuts?”