Under what circumstances do we sometimes become much more aware of the invisible cultural rules all around us?

How is culture “invisible”? Under what circumstances do we sometimes become much more aware of the invisible cultural rules all around us? In reading the article on the Nacirema, what is Miner trying to tell us? What is his method to teach his readers the invisible aspect of culture? Miner is writing a parody of a real society in order to make an important sociological point. In your answer or response to other students, please do not give it away. Each student should deduce for her/himself who the Nacerema are.