AWOL.

I've heard that sometimes they accumulate in the bottom of the dryer, like behind the panel under the barrel or something.

Into @Shoesnifferdave's personal collection

i steal your socks

That last spin cycle creates a wormhole through space-time, your other sock is somewhere in the Kuiper Belt, sorry

Under your bed

I have cats, you throw a sock in their general direction and it’ll vanish the next time you need it.