Here is an interesting story---
A man smoked 20 cigarettes every day since his adolescence. He weighed 70 Kg when he was 30 years old. He was found to have advanced lung disease for which his lung was removed. In this process he lost 10 Kgs. He continued smoking against doctor's advice. Nearly 5 years later he developed mouth cancer for which he underwent removal of Jaw followed by radiotherapy and chemotherapy. This time he lost whopping 20 Kgs. Now, he can't eat well by mouth, he has lost his job, his friends have deserted him, his girl friends are happily married off and he lives a lonely life. Now he is mostly on the bed and weighs 36 Kg!.
Moral of the story - smoking does reduce weight. Doesn't it? =P
