The Answer, don't worry I get you too.
To all the older members: you're right we're just teenagers. But in a few years, this teenager will get slapped with the realities of life. Let's be honest, unless you become really successful in life or something, your early years are the most relaxing.
Retirement is probably the next stage when you really get to relax again (again, no guarantees that you'll make it there). Is it really going to be the same as before, with an aging body?
"It's going to get much worse." We know, that's why we're worrying.