Where are my glasses?
Mrs. Richards! They're on your head!
Yep, I know all about this. Now I can call it a senior moment, but I've been doing this kind of thing since I was 6. Literally. I was in first grade. The teacher kept a can of pencil stubs on her desk, for students who came to class without a pencil. I am working away, and I can't find my pencil. So I walk up and get one from her can. A few minutes later... where's my pencil? So I walk back up to the desk again (teacher giving me the stink-eye). I reach out my hand for the pencil and find... a pencil in my hand. So I look at my other hand, and I find... the other pencil.
Where's my pencil? In your right hand. And in your left hand.