The certainty of addiction

1am. Guy on the street. Blazer with jeans. 30ish and a little drunky:
"hey man, do you have another cigarette? I'll buy it from ya."
"Yeah."
"ya, i'll give ya a buck."
"Nah, it's cool. There's a code among smokers." (handing over cigarette)
"here's a buck. I'm tryin to quit..."
"Nah, it's cool. There's a code."
"ya, well, I'm tryin to quit."
"Ya, I've been there before. A few times."
"me too. Probably be back again." (walking away)
"I'll see you around then."