A guy is walking down the street, and he's really horny. So he goes to the first whorehouse he sees. He only has five dollars, so they kick him out.
The guy goes to the next one. But since he only has five dollars, they kick him out, too. By this time, he's super-horny, so he goes to the next one and says, "Look, I only have five dollars. I'm really horny, and I need a blow
The manager there takes pity on him, and says "Okay. For five dollars, we can give you a penguin."
"What's a penguin?" he asks.
The manager grins. "You'll find out!" he assures the eager man.
He takes the five dollars, and leads the horny man to a bedroom. The horny man unzips his pants, and waits for his "penguin." Soon, a whore comes in and starts giving the guy a really hot blow job. Just as he's about to let loose, she stops and walks away. The horny guy waddles after her with his pants around his ankles, shouting, "HEY! WHAT'S A PENGUIN??"