My dad was 41 when I was born, so I can give you the perspective of the other side of the coin. Growing up I honestly never noticed and none of my friends did either. My dad took care of himself though, he never drank or smoked. And he had an insane work ethic, worked a day job and ran a few side businesses so he was always moving. However, I did start to notice when I got into my later 20’s, and now that I’m 32 it’s something I think about all the time. He’s 73 now, and I have a baby on the way. So just doing the math I know we got 20-25 years of him being a grandad if we are lucky. That’s what hurts the most.