Just googled health benefits of smoking and found this:
http://www.livescience.com/15115-5-h...g-disease.html
1. Smoking lowers risk of knee-replacement surgery
2. Smoking lowers risk of Parkinson's disease
3. Smoking lowers risk of obesity
4. Smoking lowers risk of death after some heart attacks
5. Smoking helps the heart drug clopidogrel work better
The article expands on these