I have often thought about people who "abuse" their bodies and how they should be handled. But it is so hard to define this abuse - sure alcohol and drug abuse is obvious (unless you consider possible mental conditions that may be the trigger). What about the extreme sportsman who is more likely to break their leg? What about the traveller who is more likely to come back with malaria? What about the senior businessman/workaholic who is more likely to suffer from heart condition? What about the person with diabetes who eats pizza? ... In all these examples there is the question "why do they do it?"