Once there was a prostitute who had three different rates based on the
following three conditions:

    1) $10.00 to do it on the grass.
    2) $20.00 to do it on a couch.
    3) $30.00 to do it in the bed.

It's in the morning when a Mexican walks in and slaps a $10 bill on
the table.  So they go out and do it on the grass.

Around noon, an American walks in and slaps a $20 bill on the
table. So they go for the couch and do it on there.

About the end on the day, an Indian walks in and slaps $30 on the
table.

Happy from seeing the money the prostitute says, "Wow,... you have
class"

The Indian responds, "Class my ass... Three times on the grass..."