Puru, Yayatis last son, immediately accepted his fathers proposal, for although he was the youngest, he was very qualified. Puru thought, I should have accepted my fathers proposal before he asked, but I did not. Therefore I am not a first-class son. I am second class. But I do not wish to become the lowest type of son, who is compared to his fathers stool. One Indian poet has spoken of putra and mutra. putra means son, and mutra means urine. Both a son and urine come from the same genitals. If a son is an obedient devotee of the Lord he is called putra, or a real son; otherwise, if he is not learned and is not a devotee, a son is nothing better than urine.