A bad habit is often harmful but not every bad habit is as harmful as smoking. Besides being expensive, smoking does injury to one’s health. A smoker gets nothing but smoke for his money. Smoking results in causing ulcer, stroke, mouth and throat cancer, larynx cancer, various heart diseases, pulmonary disease, bladder and cervical cancer. But habit, they say, is second nature: most smokers remain smokers for life. And even when they know that smoking can cause disease or even early death, they continue smoking. Leaving smoking habits is not an easy job but it can be done. The choice is yours whether you want to quit or not. Can anything be more unreasonable than that?