The man was curious as to why this dog wasn 't barking like the other dogs and why he was whimpering. He couldn't figure it out, so he just kept walking to work. The next day he was in the same situation where he was walking down the street and saw the dogs once again and this same dog that was moaning and groaning the other day was doing the same thing today and he just couldn't figure it out. Well, he walked passed for an entire week and every day the dog would be there moaning and groaning. So, finally, the guy got fed up, he said, "Let me find out what's going on." So he went and knocked on the door and a guy came out and said, "Yes, how may I help you?"
He said, "Sir, is this your dog? "
"Yes, that's my dog. "
"Well, what's wrong with him?"
The owner of the dog said, "What do you mean?"
"Well, he's been sitting here moaning and groaning, whimpering and whining for an entire week. The rest of the dogs are barking, your dog should be barking too, why is he moaning and groaning?"
The owner said, "Well, he's actually sitting on a nail." And the guy said, "What! Your dog is sitting on a nail. Why doesn't he get off?"
"Well, it just doesn't hurt him enough."