David, no offense taken. Sure expressions based on nationalities must be related to history and wars -our cockroaches are "German cockroaches" too while theirs are "French cockroaches".
You have French letters and we have "capotes anglaises" ("English great-coats"), you take French leave and we "leave the English way", you have French fries while we have fries and we have "crème anglaise" ("English cream") while you have custard. I'm very glad that the French kisses are ours and to go back to sexual education without ditty, French women see "the English turn up" every month.