Keys.....

I know a man with so many keys in his bunch that I have no idea how he selects the correct one to open a door. Clever.

These are my old house keys from when I lived at home....the extra one is for D's house. I found the old porch keys hanging up the other day.....those doors have been gone over 5 years. Keys are funny things....they lock things in, lock things out, show ownership.....

What is the key to.......