Our crew at an ambulance company works 24-hour shifts. The sleeping quarters consist of a large room with several single beds, so we get to know one another's habits, like who snores or talks in their sleep. While I was having my teeth examined by a dentist one day, he noticed that some of my teeth were chipped. "It looks like you clench your jaw at night, " he said.

"No way, " I blurted without thinking.

"No one has ever said I grind my teeth, and I sleep with a lot of people!"