Some years ago—back before I obsessively kept notes about these things—I read an interview with Frances Mayes (of Under the Tuscan Sun fame).
Mayes said that while she often asks about local customs when she travels outside the United States—how things are done and so forth—she is not often asked those things in return about the States. The reason, she believes, is because foreign visitors think they know us already. That is, our culture (think Hollywood) has been so vigorously exported that the rest of the world feels it already knows what our lives are like.
It’s something to think about.