What's a penguin?

A poor man is walking through a red light district and decides to try to get a deal on a prostitute for the evening. He walks into a whore house and asks, "What can I get for $5?"

"Absolutely nothing. Get the hell out of here." comes the reply.

He tries one after another with similar lack of success. He comes to his last option and pleads desperately with the pimp, "Look man, I've only got $5. I'm desperate. I'll take whatever you have to offer, anything. Just a blow job would be enough."

"$5 isn't nearly enough for a blow job." The pimp laughs.

"Well, how about just a hand job?" The man asks desperately.

"Nope, not enough for a hand job buddy." the pimp replies. The poor man turns to leave but the pimp adds, "Look, I might be able to do something for ya bud. $5 isn't enough for even a hand job.. but you can get a penguin for that."

"What is a penguin?" asks the man.

"You'll see." the pimp replies grinning.

The man considers his options. He knows his $5 won't get him anything anywhere else so he figures, "What the hell, I'll take it."

The pimp takes his $5 then leads him back to a room and tells him one of the girls will be with him shortly. He's standing in a room in a whore house wondering what he's about to be in for when in comes a prostitute. She isn't a bad looking girl, in fact she's pretty attractive. Without saying a word she undoes his belt and zipper, drops his pants, and goes to town. She's giving him great head and the man thinks to himself, "Damn, this is great!" He's getting close to climaxing but before he cums the prostitute stands up, turns around, and walks out of the room. The man is confused and tries to follow her but his pants are around his ankles so he's only waddling after her and he shouts, "Hey, what's a penguin!?"