Down the back of the sofa or under the piano. You can drop something upstairs in the front bedroom in our house and you will find it, 4 days later, under the piano, downstairs, in the dining room at the back of the house..... I'll check there for the 'Cat next time I lose an earring in the bathroom.

I'm convinced that pianos generate a sort of magnetic field that attracts all objects small enough to pass under said piano but only one way. Never any socks there though. They get eaten by the washing machine.

LTS