When I was little, a family friend Diane came to stay and left a pair of shoes behind on accident. She got in touch with us apologizing for the inconvenience and hoping we could bring her shoes back the next time we saw her.
It turned out, this simple task became a 10-yr long pursuit of a pair of very elusive shoes. Every year or so, we would find one of them. We would put it someplace 'safe' until we could find the other. When the other turned up, nobody could remember where the mate was put. It went on like this until we finally moved out of the place. Naturally, even then we could only find one of the shoes.
This summer, we had a similar experience with Layla's sandal. She is starting to be a bit finicky about which shoes she'll wear, so when she got attached to this one particular pair we were devastated when one got lost. We looked and looked, and finally gave up and hid the mate as it was turning the house into chaos every time Layla saw it and got upset over not being able to wear the pair of them. When we finally found the missing sandal, we couldn't find the one we had hidden. Remembering my traumatic past experience with this sent me into a panic. Luckily I found a similar pair at a used store and bought them with a sigh of relief. Immediately, we lost the mate to that one too. I believe it is just these sandals that are cursed, as we have been quite good at keeping track of her other favorite shoes. This week, as I was packing up Layla's old shoes to go to Goodwill, I found one of each of the two pairs of sandals and finally had to throw them both away.