Throughout my early 20's, I did feel this way. I always told people I never wanted to experience old age. It was a part of my live fast, die young mentality. However, then came 25, then 27. And, soon, 27 onto 30. Through these years, I've realized their is something motivating about knowledge accumulation that makes me want to see 90.
Although we lose a portion of the physical thrills that our 20s brings us, I can now say I look forward to live thereafter.