It is an unchangeable fact of life (for the time being, at least; who knows what the future holds in terms of science and technology) that we are all destined to grow old and grey. It makes no difference how wealthy we are, how closely we follow our fitness or food regimen, how much sleep we receive, or what we do for a living.
Even if we may age differently, we’re all ultimately going in the same way. Since it’s fundamental biology, there isn’t much we can do about it.
For this reason, it’s funny in a way that we might still be taken aback when we witness Father Time’s hand at work. Maybe you haven’t seen someone in years, and you’re surprised at how old they are? Or you recognise an old movie star from your youth, but their youthful energy has vanished and their hair has turned white.