when you're 13 life is interesting and great
i don't think i had a care in the world, it was great
and for the next 10 years or so you're going to have SO much going on. High School. Graduation. Girlfriends. College. Life Decisions. Etc. etc. etc.
and then it kinda evens out.. you either get married, or you stay single, and there's nothing really life-changing or exciting to look forward to... heh. Unless you have a kid every couple years to keep life interesting and crazy, or something...