I spent too many years living in London, England, but while I was there, I ran into something very mysterious...
No matter where I was, in London, there was almost always to be found, on any given street, one shoe, lying discarded on the sidewalk, or in the gutter. This continued to be the case for as long as I lived there. It mystified me. What on earth was the story behind all these odd, abandoned shoes?
Finally I chanced to discover the answer, which was not at all obvious, until it suddenly was.
Who can guess what was going on?