mostly unrelated anecdote that i want to tell anyway:
scene: me, in mexico, being introduced to a friend of a friend of a friend.
friend - this is whatever he name was.
him - hello, everyone calls me "el negro".
me - hello, i'm sys.
him, proud of his knowledge of colloquial american english - you would call me "the n-word".
me, internally - uh, no. no i would not.
me, externally - mejor hablamos en espanol.