First, allow me to say, i don't smoke. I don't do it for health, and hygene reasons. I've smoked a few cigaretes after drinking in college. I did it enough to start enjoying it, but not enought to get hooked on it. If smoking had no side effects, i'd probably be lighting up right now

Anyway, on to my point
I was driving home after midnight, and though of something interesting. What if i would start smoking in my dreams? My dreams seem real enough where if i light up, i could enjoy it. The feeling of smoke, the taste, the warmth. All the goodness, minus the surgeon general warning. This actually applies to everything else. I am trying to drop a few pounds, so in my dream, i could, say, pig out on a pizza, or a bowl of ice-cream.
Would that have any impact on me in real life though?
Something along the lines of a placebo effect.

So, has anyone done this? Now, i am sure there's much more interesting things to do in a dream then smoke and eat ice-cream, but still, it makes me wonder.