Now we know why

Cigarette warning labels not only do not deter smoking but actually encourage smokers to light up.  The reason?  The nucleus accumbens, or the “craving spot” in the brain, is stimulated by the sight of the warning.

Time, 3 November, 2008; Page 8; Discussing the book “Buy•ology: Truth and Lies About Why We Buy,” by Martin Lindstrom

And I thought it was just because addicts didn’t like to be told what to do, and generally did the opposite of what they are told by people they don’t respect.  Silly me…