My old friends faces don't age

Not long ago, I entered the fourth decade of my life. And so have, obviously, my contemporaries. People I knew as a kid are now men in their forties, and we look like men in our forties. Some grey hair here, some baldness there, more and more wrinkles. Normal stuff. When I see a stranger with these features, I think: ah, a forty-ish year old man who looks just like a forty-ish year old man. But…