@Goldielocks - Your family are good sports that you had them for 30 minutes.
There was lots of teasing, joking and throwing socks around. And then the dog started to steal socks that fell to the floor.
Imagine an 8 person dining room table filled with unmatched socks 2-3 deep.
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Funny thing is that everyone does their own laundry, separately.
What happens is that if someone is out of socks, they will steal some from another person's drawer. After laundry comes out of the dryer, it is usually put on the counter unfolded so the next person can use the dryer, then it gets a bit mixed up between persons, and the socks get put into the wrong person's room when they take their things away to fold (or not fold). Unclaimed single socks left behind (if not just tossed in a heap of clean laundry back into their room) will be put into a basket in the laundry room by me, after a week or two. I try not to care about their laundry habits as long as they are clean.
Two of them have zero cares about wearing mismatched socks, or actively think that it looks good (!), and the third likes the matching sock look, but not enough to be bothered to match. One person actively throws out single socks as soon as a hole develops, without looking for a match to toss, too, because socks are usually bought in quantities greater than 1 pair. Apparently sleep overs are the originator of many missing socks.