Why?

This seems corny but, I have a favorite pencil. I have bought extra erasers & lead for this pencil. I heart this pencil.

I couldn't find it so I bought another. Next thing I knew there were three. Apparent procreation.

Now I have none. I've searched everywhere.

I know if I go buy another the other 3 will show up. plus I really don't want to take the time to go to the store for a new one

Why does this happen? and if all of life's problems were only this minor