John Sturgis: This list is getting long. Maybe we should write it down.

Sheldon Cooper: Hey.

Sheldon Cooper (narration): In that moment, I had an epiphany. I could draw up a contract for any social relationship. It was a helpful way to remove ambiguity in a world that was often hard to understand. I would go on to draw up such contracts throughout my life... With roommates, with my wife. Even with my own children.