And Pinpointing Its Source Is Almost As Good As Being Alive

Man, offered a cigarette: No, I never smoke.
Woman, offering cigarette: Come on, you won’t get cancer from one cigarette. Well, if you do, you’ll know where it came from.

http://www.overheardinminneapolis.com/2007/04/itll_be_a_really_cute_story_so.html

Overheard by: standing outside