Why is it always in the last place you look?

The answer

Because once you find the thing you were looking for, you stop looking. The place where you found it is therefore always the last place you searched, even if it was the very first place you checked. Lost things are not hiding there on purpose. In this made-up case from Matter of Record Files, Maisie lost her glasses and Inspector Fig searched the kitchen, the sofa cushions, the bookshelf, the laundry basket and even the fridge. In the end he looked properly at Maisie, and her glasses were on top of her head the whole time. A second remote did turn up in the sofa along the way.