I bet he has no trouble remembering where he left his car keys

 It's true, I don't have that problem. I haven't got a car. I have, however, got a bike, and I wish I could remember what I did with the lights. I distinctly remember they used to live in my laptop bag for work, and a while ago (after living for at least two years within a couple of minutes' walk from the office) I decided to take them out and keep them somewhere more sensible from now on.

I don't expect I'll ever see them again now. I'll have to buy some new ones...