A man sees another leaning against the wall of a large building. The second man is puffing away, one cigarette after another.
The nonsmoker says, "Sir, I couldn't help noticing how you chain-smoke. How many packs do you smoke a day?"
"How long have you been smoking?"
"That's over six thousand packs. Why, if you didn't smoke, you could have saved enough money to buy this building."
The smoker takes a deep puff and says, "Do you smoke?"
"Do you own this building?"
"Well, I do."