A joke One day, a son as well as his father and grandfather goes fishing by a river. The son observes his grandfather for a long time and finds that no fish has risen to the bait of his grandfather. He goes up to his father and says: look at your father. He hasn't got any fish up to now. How stupid he is! The father gets very much angry and replies: how dare you insult my father? The stupid person should be your father.