“How did that happen?” “Dunno. Time does stuff like that.” “Behind your back?” “Yep.” “That’s a bugger.” “… and you don’t even notice…” A friend paid me the compliment the other day of asking if I had reached fifty yet. My son almost immediately disposed of any lingering glow in which I might possibly have been basking, with his utterly horrified expression when he asked to be reminded of my age.…