37 years I've been washing clothes for the BrickOutHouse so you would think I'd remember to check the sleeves.
He has had this habit, forever, of taking off a jumper or tee shirt and leaving one sleeve inside.
And there's nothing worse than wrangling wet sleeves at the clothesline.
But I can see the logic in his sock habit.
If you have two socks and they have holes in different places then wearing them together makes one whole sock.
Except if one of the socks in question has no foot just an upper. But this is acceptable since tying the laces on his work boot stops it from crawling up his leg.
So this is why I bought him half a dozen pairs of new ones for his birthday. He was pleased, he can't think why his socks are disappearing.