When did you start forgetting?

59, sigh. I can walk into a room, and think wtf did I need in here? Hour later, remember, walk back in, and can't find it...grrr.
My son makes out, as I lose tools, buy new ones, and then find the old ones. I spent 4 hours in my shop one day, looking for my chainsaw. The shop had been broken into, so I figured I missed the saw being stolen. Bought a new one, and 2 days later, there the old one sits.
Cleaning the shop, I found 4 sets of new brake shoes, no boxes, haven't a clue. Found a 3 speed tranny, 230; no clue. I can remember being in 3rd grade-3 minutes ago? nada. It's to the point that I carry a pen and a little notepad in my shirt pocket....
And I keep finding stuff I hid. But I hid something in 1988, and still can't find it.