The Koala and the Hooker

So a koala gets off the plane and walks into a bad section of town
where he sees this really slutty chick on the corner.  So he goes over
to her and buries his face in her clam.  A couple of minutes later he
turns around and starts to walk away.

The girl who turns out to be a prostitute says, "Hey, what about my
money?"

The koala replies, "What ever do you mean?"

She says "I'm a prostitute, I get money for that sort of shit."

The koala does not understand, so the whore takes him to the library
and they look up 'prostitute' and find the definition:

Prostitute: a person who is paid for providing sexual
services

"Do you understand now?" says the prostitute.

So the koala grabs the dictionary and flips to another page which
contains the definition of 'koala':

Koala: animal which eats bush and leaves