Aging

"…..When I was 20, I wondered what it would be like to be 50. None of my guesses were close. I assumed that "aging" was automatically bad, so I didn't look forward to it. No one told me that having more friends and fewer zits would feel like a good tradeoff. And if you told me I could have my twenty-year old body again, but I had to take my twenty-year old brain with it, I'd pass."

http://dilbertblog.typepad.com/the_dilbert_blog/2007/06/happy_birthday_.html