Yeah, aging is tuff for the physically beautiful. Especially actors who's fans don't want them to ever change. I know for me, it's a little funky, probably because it reminds me that I'm getting older. Ha!
It's the same with Robert Redford. It's easier for guys like Robert Duvall or Steve Martin who looked 40 when they were 25. Ironically, it's Redford and Elwes lack of narcissism that kept them from freaking out about not looking 25 anymore (and kept them from looking like some of the other Hollywood Bruce Jenner typ freaks). Aging isn't fun but we'll all get there if we're lucky.