A blind man is walking down the street with his seeing-eye
dog one day.

They come to a busy intersection and the dog, ignoring the
high volume of traffic zooming by on the street, leads the
blind man right out into the thick of the traffic. This is
followed by the screech of tires and horns blaring as
panicked drivers try desperately not to run the pair down.

The blind man and the dog finally reach the safety of the
sidewalk on the other side of the street and the blind man
pulls a cookie out of his coat pocket which he offers to the
dog.

A passerby, having observed the near fatal incident, can't
control his amazement and says to the blind man, "Why on
earth are you rewarding your dog with a cookie? He nearly
got you killed!"  The blind man turns partially in his
direction and replies, "To find out where his head is, so I
can kick him in the ASS."