When your car is new, you take it for granted, and what dominates discussions with your friends are all the wonderful places you will go with your car, without ever giving much thought to how your car will get you there.

When your car is old, it starts to malfunction, and what dominates discussions with your friends is the state of your car, what's broken and what's working, and tips on how to fix or work around the things that aren't working anymore. The older it gets, the more you discuss the state of your car and the less you discuss all the wonderful places you will go with your car.

Our bodies are just like that. Bottom line: when you are young, take care of your body so that it can continue to take you to great places for as long as possible.