Cliche, I cast thee down!

So here goes...I believe it was James Dean who said(in a film ..);

"Live fast , Die Young and leave a good body"

changed to mine;

"Live fast, Die Old and leave a fit body"...

Why is it that so many guys let themselves go so early?
Useless Friday evening fact, you only lose 5% of your muscle mass as a bloke up to and including the age of a glorious 65.
So role up for the old boys Iron Man, eat well, drink less booze to pick up the 04.00 Dragon and roll off the coach.