At 48, I smile a bit and ask, "do I fear aging?" In a word, yes.
I just don't equate aging with how many months (576), weeks (2,304), days 55,296), hours (1,327,104) or minutes (76,626,240) I've gone through on this planet.
I'm sure when I get old, it'll most likely (what's that word......? oh yes...) suck.