I am SO glad other folks do this... number of times I've found the car keys in the fridge...
And then there are the times I've been dusting and put the cloth down and couldn't find it for half and hour (though it's agood reason to do someting more interesting!).
Mother reckons I'm a good 'looker-for' but a lousy 'finder-of'.
Personally, I reckon it's house-elves..