9. My friend's wife thought a "Caucasian" was the actual name
for a white russian.
This caused a minor kerfluffle when they were at a nice restaurant and the African-American server came up and asked if they would like to order drinks. She looked the server dead in the eye and said totally innocently "I'd like a Caucasian."
My friend had some explaining to do, the server was cool with it, and she was mortified.