scarlett, at last, someone talking some sense.nicotine affects our bodies in a lot of ways, once the nicotine receptors have been ignited for instance.but some people with no knowledge and a whole lot of speculation come on and give daft opinions.smoking will NEVER be good for anyone, and I'm a smoker by the way.Different pharmacological actions happen via nicotine, once its in your system for a long time,but its a bit like saying nicotine makes you go to the toilet and poo(which it does) and when you stop smoking you might get constipated.yes, for a brief time till your body adjusts .anyway iots obviously way ovwer the head of some people on here