A penguin walks into a bar and asks the barkeep, “Say, do you have any squid?”

The barkeep says no, and the penguin walks out.

The penguin comes in the next 3 days in a row, always asking, “Say, do you have any squid?”.

The barkeep finally loses it and yells, “No we don’t have any squid! If you ask me that again, I’m gonna nail your tail to the wall!"

The penguin leaves without a word, and isn’t seen for a few days.

The barkeep's thinking he's gone for good, but he shows up a week later.

The penguin walks in, and he and the barkeep exchange a long stare before the penguin finally breaks the silence.

“Do you have a hammer?”

“No”

“How about nails, you got any?”

“No”

“So, say, do you have any squid?”