Once upon a time, a father and a son went to sell their old horse in the market. While they were on their way to the market, a group of people commented, "We have never seen such idiots in our life. In spite of having a horse you are walking!" They both thought about it and sat on the horse.
Another group of people came and said, "How cruel you are! You both are sitting on this poor old horse. Have some mercy on it." They both thought about it, and the son sat on it while the father started walking.
Again, another group came across and said to the son, "What kind of young lad you are? You are enjoying a ride on this horse, while your old father has to walk in this hot weather." The son started walking and let his father sit on the horse.
Another group came across and said to the father, "What kind of father you are! Your little son is walking and you are enjoying yourself on this horse."
Both father and son became so upset that they carried the horse on their shoulders. Then all the people started laughing on them.
Finally, they got rid of that horse by throwing it into a river.