Penguin

A guy went to the whorehouse looking for fun.

He asked the lady of the house for a fuck and she said to him "How much money have you got?"

"Well, I've only got 5 dollars" he said.

"That won't get you a fuck, but I could give you what we call a penguin."

"I'll take it." he says.

She sat him down in a chair and pulled his trousers down around his ankles and starts to give him a blow job.

She watched him carefully and when he seemed ready to come she jumped up and ran out the door.

In shock he jumped up with his hard on and had to waddle towards the door with his pants around his ankles and called after her "Why do they call this a penguin?!!!"