What's your quotidian mystery?

Until a few years ago I often wondered why I could put 10 pairs of socks in the laundry and only get 9 1/2 out! Then I found out that the drain holes in the washer have outlets to another dimension. Our socks just show up laying all over the place in that 'other' dimension. That dimension is a place where people don't know what socks are for. They make hand puppets out of them, sew them together for blankets/quilts, wear them as mittens, use them to keep their men's 'member' warm, tie them together for the dog to play 'tug-o-war' with, use them as 'hot pads' and place settings. They have discovered thousands of uses for them, we here in THIS dimension would never even try to imagine.