Mexico-No-No

(I work at a retail cosmetics store as an aesthetician, but often walk the floor to assist customers. I am part Mexican, but only one quarter, and the rest is an amalgamation of Caucasian, so I simply look a bit “ethnic,” and no one can ever place my ethnicity. I’m very used to it. I’m helping an elderly woman customer look through different makeups and having some polite conversation while doing so.)

Customer: “Now, what ethnicity are you? Greek? Indian?”

Me: “I’m actually part Mexican—”

Customer: “No, that’s not it.”

(I guess she would know better than I would.)