A depressed koala walks into a bar.

He sits down and orders a drink, and the bartender says "You look a little down. Why don't you go down the block and meet up with a friend of mine? She'll lift your spirits." The koala goes down the block and finds a prostitute, takes her to the nearest motel, and fucks her. When they're done the prostitute says "Alright, so where's the money?" to which the koala responds "What money?" She grabs a dictionary, looks up "prostitute," and shows the koala it's definition: "has sex for money." The koala takes the dictionary from her, looks up "koala," and shows her his definition: "eats bush and leaves."