It's washing machines and dryers that find socks delicious.
... which is less of a joke than you'd think. Small items can get partially forced between the rubber seal and the drum and then when the drum rotates, the item is slurped outside like a strand of spaghetti.
Also sometimes identical-looking socks that get paired together by the manufacturers eventually drift in appearance because they were from separate dye batches, leaving the owner with a pair of odd socks.
The other other explanation is the sock gnomes. We don't talk about the sock gnomes.