A dog wandered into a man's yard. He could tell from its collar and well-fed belly that the dog wasn't a stray; that it had a home and was well taken care of. The dog calmly wandered over to the man, who gave it a few pats on the head. The dog followed the man into his house, curled up in the corner and fell asleep. An hour later, the man went to the door, and let the dog out.
The next day the dog was back and its visits continued off and on for several weeks.
Curious, the man pinned a note to the dog's collar. It said, "I would like to find out who the owner of this wonderful sweet dog is and I ask if you are aware that almost every afternoon your dog comes to my house for a nap."
The next day the dog arrived for his usual visit to the man's house but with a different note pinned to his collar. The note read, "He lives in a home with 6 children, 2 under the age of 3. I suspect he's trying to catch up on his sleep. Can I come with him tomorrow?"