Guys understand cars.
And to keep that car looking good at 100,000 miles, you need to take good care of the sheet metal and paint. Just like your car, your body requires a fair amount of preventive maintenance to keep it running properly. Really the only difference is that while you could eventually buy a new car if your first one doesn't last 100,000 miles, you don't have the same luxury with your own body. And you can't go to a restoration garage at 90,000 miles for an overhaul. The human body at more than 50,000 miles is a byproduct of what was done to it, or not done to it, in the first 50,000 miles.