beniits of cigarettes?

Well personally I have never smoked in my life but my father and my brother do. They say they started doing it just to be cool but now it helps ease their nerves so they continue to do it. I don't think it is good for our health because as an at home caregiver I have seen a woman who got COPD from second hand smoke from her husband and he also passed away of lung cancer. So I do believe it is bad for your health but most smokers will not admit it my father being one of those, he swears it does not hurt you but I know it does I have seen it first hand.