Johnny was sitting on a park bench enjoying a cigarette

Little Johnny was sitting on a park bench enjoying a cigarette.

A woman stopped, “excuse me young man, but I’ll have you know that those can take years off of your life.”

“No disrespect ma’am, but I’ll have you know that my grandfather lived to the ripe old age of 104.”

“Did he smoke also?”

“No, he minded his own bang business.”