Just a few minutes ago I was sat at my computer doing something.
While doing whatever I was doing I had an idea which led to me standing up and leaving the room. By the time I had left the room, I had forgotten the reason I even stood up in the first place.
"Never mind", I tell myself, just go back in and carry on with whatever you were doing. So I get back in front of my computer and sit back down only to find that I've forgotten what I was doing before whatever it was that compelled me to leave the room in the first place.
I'm not even 40 yet.
Welcome to my world, and many other TEF posters I suspect.