I've once read somewhere that they polled heroin addicts, asking them what they'd rather do first time they wake up in the morning - shoot heroin or smoke a cigarette.

Of course the vast majority said they'd smoke a cigarette.

I've never been a heroin addict, but I've been a tobacco smoker for many years and I can confirm that smoking a cig was definitely the most important thing I had to do in the morning.

Also if I had to spend my last money on food or a pack of cigarettes, obviously and without further consideration, I would choose the cigarettes.

So yeah, pretty addictive.