An old, tired-looking dog wandered in the yard.
           I could tell from his collar and well-fed belly that he had a home.
            He followed me into the house, down the hall, and fell asleep in a corner.
           An hour later, he went to the door, and I let him out.
The next day he was back, resumed his position in the hall, and slept for an hour.
           This continued for several weeks.
                       Curious, I pinned a note to his collar, "Every afternoon, your dog comes to my house for a nap."

The next day he arrived with a different note pinned to his collar, "He lives in a home with ten children - he's trying to catch up on his sleep."