Check under your sofa cushions and behind your bed, that is usually where I locate mine lol.

I think the only knife I have actually "lost" was one of the antique throwing knives my grandfather gave me. I was practicing throwing them and it bounced off the target and landed god knows where.

All the other knives that i have "lost" occurred during one of my 35+ moves and all from movers with Roman hands and Russian fingers. The ol' five finger discount ie. robbed me blind. Had a few swords stolen too that way.

I have thrown out though a lot of knives over the years, due to them breaking, and those were all folders.