At our house, things usually disappear with the 'assistance' of the tuxedo cats. My husband has a pocket knife that was a gift when he was a teenager (50+ years ago) and he lost it someplace. He looked all over retracing his steps at the condo, in the car, in the garage, on the deck (feeding the birds!), even asked the staff at the Big Boy where he has breakfast every morning after I leave for work if they would watch for it. But it never turned up until one day weeks later, Jake walked past him in the bedroom with the (big) knife in his mouth. So far they've pilfered car keys, change, DH's inhaler for his asthma, jewelry, toothbrushes, etc. Jake takes things more often than Elwood, though Elwood likes change and is always happy to shred anything made of paper, especially if it has a picture of a president on it.