SMOKING besides the bad side also has a good side.
Quoted from Live Science (in jurnas.com).

• smoking lowers the risk of joint damage. because nicotine in tobacco helps prevent cartilage from joint damage.
• Smoking lowers the risk of Parkinson's disease (nerve damage).
• Smoking Reduces Obesity Risk. Nicotine in tobacco smoke is an appetite suppressant.
• Smoking helps the heart of drug clopidogrel work better. Clopidogrel is a drug used to inhibit blood clotting for patients suffering from coronary artery disease, and other circulatory diseases that lead to stroke and heart attack. Smoking can help Clopidogrel do a better job. Smoking at least 10 cigarettes a day, will activate a specific protein called cytochrome, which converts more active clopidogrel.