It seems for me that every day is a lost sock day. I don't know where they go; they just seem to disappear, never to seen again. I even started putting them in a mesh laundry bag before putting them in the washer, and occasionally one still goes missing.
It’s one of life’s mysteries, or the work of the phantom of the washing machine! I have this image that one night, in the early hours of the morning, I go to the washing machine and suddenly they will all be there again. Returned from their adventures, with their own individual stories to tell!