A koala bear goes to a prostitute and says all he wants to do is go down on her. So he goes crazy, he's down there for like 2 hours.

When he gets done, he starts walking out. The hooker says "Hey, koala bear, hang on, you gotta pay me. 200 bucks."

koala bear says, "I ain't paying you shit lady."

Prostitute goes, "no, you don't understand, I'm a hooker, you gotta pay me." She then grabs her dictionary from her bedside table and looks up the word prostitute.

"Look, it says right here - 'PROSTITUTE: Performs sexual favors for money.' You got to pay me."

the koala bear snatches the dictionary from her and says "I'm not paying a dime - 'KOALA BEAR: Eats bushes and leaves.'"