Years ago I told my girlfriend a joke, it went something like this:
Me: Did you hear about the French lesbian who went back home to France?
Her: (Shakes her head no)
Me: She missed her native tongue.
After I said the punchline, she didn't get it, just sat there and looked at me straight-faced, trying to make sense of it, finally she blurts out, "They have natives in France?"