I am fairly certain there is one lurking around in the back of my sock drawer...
If you’re referring to the “missing sock” phenomenon, I’m pretty sure aliens are to blame. They must use only the left (or right) sock to fuel their spacecraft or something, but not the other one, for some unknown reason. I’ll have to call George Noory and see if he knows anything. I’ve left sock traps for them, btw, but apparently they’re too smart to fall for it.