You shouldn't take someone else's cigarettes.
Tom is a social smoker and is out at a bar with friends on a weekend night.
Tom wants to smoke a cigarette.
Tom buys a pack of cigarettes from a vending machine inside the bar.
Without asking, Tom takes a cigarette from the pack of a stranger who left it on their table.
Tom enjoys having a relaxing smoke on the bar's back patio.
Tom is yelled at by the stranger for stealing a cigarette, and he feels bad about it.