Who's Old?

Dr Ali Hendi, a dermatologist, was talking about the new sunscreen standards tonight on The PBS News Hour, and he said (and I'm paraphrasing here) "Skin cancer use to be a disease of old people - we would see it in forty year olds. And now we're seeing it in young people." And I wondered: when did forty year olds became old people? I know a woman who is forty-two and considers herself barely out of her teens. Though that is true for her mentally, not so much in reality. Lose the bikini.

What's your take? When do things get more difficult? What does it mean to age...or to be in denial like my 42 year old acquaintance? What do you do differently? What do you fear? What are the best things about being older? I can think of dozens...like I really don't give a rat's pajamas about a lot of stuff that would have tortured me in my youth.

Well?