What age constitutes "old"?

[lars573]

In 1995 when I was 35 I got up to go to work and went for the usual shower, and shave, as one does. Imagine my disquiet when I looked into the mirror and saw my father at 35 looking back at me. I nearly crapped myself.

I've seen that since I was 20 (although my brother was the one weirded out by it). My dad didn't really age until 45.