My younger son was always coming home with stuff he found on the ground. We christened him good at finding things. It helped him break the chain of "can't find anything" he would have inherited from his father.

Most of the time that DH is storming through the house looking for small object X, I ignore him. Sometimes I just go and get it.

Of course I lose things too; but he definitely has it more seriously than I do.
Being the age that he is, he often just buys replacements and then finds the original later. This does not help much for car keys and wallets.