The saying, "It's all fun and games until someone loses an eye" originally had a different meaning, similar to, "You can stay out and play until the street lights come on." In the old days, before street lights when children played "pointed sticks" instead of "hide and seek", parents had to think of a way to indicate to their children that it was getting dark and time to come home. The children were quite adept with their sticks until the sun began to set when mistakes would inevitably occur, and so it was "all fun and games until someone loses an eye. Then it's time to come home."