Tommy (who has just begun learning French, on his first visit to Boulogne). "I say, daddy, did you call that man 'garçon'?"
Daddy (with pride). "Yes, my boy."
Tommy (after reflection). "I say, daddy, what a big garçon he'll be when he's out of jackets and turn-downs, and gets into tails and stick-ups!"
(You may speak to anyone in France, even to a bold gendarme—if you are only decently polite)