A blind man with his seeing eye dog are walking down a busy street in town. The man comes to a cross walk to get to the other side of the busy street.
The seeing eye dog proceeds to lead his master across the street in rush hour traffic. Cars are honking horns, screeching their brakes to avoid hitting the man and dog. The man finally makes it across the street, unbelievably safe and sound.
The blind man reaches in his pocket for a dog biscuit. One man that witnessed this walked up to the blind man and said "Mister, I just saw that dog of yours take you across rush hour traffic, almost getting you killed and you are rewarding him?! The blind man said "I'm not rewarding him, I'm just trying to see which end is his head so I can kick him hard in the behind!"