Seriously?
I think it should be permitted because smoking cigarette doesnt make you feel happy, relaxed or detached from reality while alcohol and marijuana does. So, it should be allowed to smoke during fasting.
Cannot be, nicotine and other stuff in a smoke gets absorbed into your blood. I am a heavy smoker myself and Ramazan is one month where my smoking goes down to minimum without even feeling any urge to smoke. Why would you waste such a disciplined time wishing if you could smoke?