A duck walks in a bar and sits down. He asks the bartender, "You got any crackers?"
The bartender answers, "No, we only have beverages."
Duck leaves.
The duck walks in the same bar the next day. He asks the bartender, "You got any crackers?"
The Bartender answers, "No, I told you yesterday, we only have beverages."
Duck leaves.
The duck walks in to the same bar for the third day in a row. He asks the bartender, "You got any crackers?"
The Bartender frustratingly answers, "NO! I've told you twice already, we only serve beverages. If you ask me again I'll nail your feet to the wall!"
Duck leaves.
The duck walks into the bar yet again the next day and asks the Bartender, "You got any nails?"
Bartender replies, "No."
"You got any crackers?"