as you get older, staying in shape provides benefits.
When you're 20 or 22, most people look pretty much the same thanks to metabolism. Most people are fairly lean.
When you're 35 or 40... most of your friends are fatasses. They are weak and they look like shit. if you're 180 and have abs, you are usually the stud among them. You can order any fruity ass drink you wish... if they give you any guff, you smile at their wife, who obviously wants to fvck you instead of them.
You shrug, smile, and you take the biggest sip of that boisenberry margarita that you like. As time tears down your peers, you will emerge as the winner.