A Koala bear goes to a prostitute and they have sex. After they’re done, the prostitute says:

“That’ll be $50”

The Koala replies, “what do you mean $50?”
The hooker gets a dictionary and shows the Koala bear:

Prostitute: Gets paid to have sex

The Koala bear grabs an almanac and shows the hooker:

Koala Bear: Eats bush and leaves