There is a big difference between smoking and being overweight, though both can cause heart attacks. The smoker can physically damage innocent other people who do NOT smoke, while enjoying his habit. The overweight person, while certainly indulging in a dangerous practices, only PHYSICALLY harms himself/herself, though the family suffers emotionally if something happens to that person such as a stroke or heart attack. Actually, I am going to contradict myself here, as I have thought better of it. If a mother is overweight, there is a greater incidence of obesity in the children, as well, because she is generally preparing the meals and setting the nutritional tone in the household. So overweight actually can have a direct bearing on the physical well-being of others.