The arguments that "knowing how to behave" in settings and contexts is culturally-conditioned is a strong one. Consider how most of us might respond if taken back in a time machine to the turn of this century, into a saloon with a "free lunch." Would we intuitively know (unless we grew up in Chicago and were regulars at the "Berghof") that we expected to help ourselves, contingent upon buying a drink? We are culturally conditioned to paying directly for food in an eatery. Or consider that bevavior with banknotes, expected at some ethnic weddings, would probably start a donneybrook at a wedding of a different ethnicity. How would an American of lower middle-class in the 1930s have known how to behave at (say) the Henley cup regatta? etc.