Oh Lord! I just had an epiphany!! Negroes and shit are both ugly and stink.
Negroes and shit are not only similarly ugly and stinky, but useless and repulsive as well!!!
As you can clearly see, Negroes and shit are interchangeable (except shit isn't likely to murder you and rape your corpse).
Wow. That's truly profound. I'm emailing this post to the Library of Congress.