Or when you want something from a stranger. "Excuse me sir, have you got any change..." (And similarly with the leafletting, cashiering, tour-guiding and door-

Or when you want something from a stranger. "Excuse me sir, have you got any change..." (And similarly with the leafletting, cashiering, tour-guiding and door-holding occupations I've had in the past. You want people to feel important, and you're in a subservient position, so you elevate them verbally. Basically, when you're a Baldrick.)