When in France, don’t become alarmed when the natives greet you with too much enthusiasm. After all, they’re French.
When in France, if you are a woman, some icky natives might actually put their lips on your knuckles. Don’t bother explaining to them that the lips aren’t supposed to actually come into contact with a lady’s hands. After all, they’re French.
When in France, bear in mind that “Liberty, fraternity, and equality” is a rather quaint old motto, but what matters is peace, security and development/stability, and having just enough to eat. That probably explains why, when in France, American flags were not displayed in Paris on D-Day (except for these), but instead they displayed the flag of the European union.