I know for a fact that they are with the missing socks, probably engaged in something kinky that I don't want to think about.
I figured out how to get around this. I only buy two kinds of socks; white crew socks, and black crew socks. I buy them in large quantities. So if individual socks go off to do unspeakable things, no doubt accompanied by the wife's pantyhose, I never know, since every white sock matches every other white sock, and ditto for the black ones
I call it 'don't match, don't tell'