Is there something that you see In life where there Is never one reasonable, rational answer as to why ?

Do you ponder these things as I sometime's do but fail to find the answer?

Mine Is this :

Why Is It that whenever I am on a Motorway, doesn't matter which one or what direction I'm going In.... In the middle of the road, on the side of the verge or even hanging from a tree, there will be one shoe. Never a pair of shoes, just one.

As I drive past the lone shoe, I find myself scanning the road and verge wondering where the other one Is but I never see one.