A monkey
A monkey enters a bar and asks the server:
"Mr., do you have bananas?"
the server answers him: "no".
the monkey: "Mr., do you have bananas?"
the server: "no"
the monkey: "Mr., do you have bananas?"
the monkey: "m'iser, you have bananas?"
the monkey: "Mr., do you have bananas?"
the waiter: "Listen, if you ask me again once if I have bananas, I'll nail your tongue on the bar!"
the monkey: "you have nails?"
the server: "no"
the monkey: "Mr., do you have bananas?"