Son: Father, I am in love with 3 girls who are all in love with me. I want to marry one of them. They are all from Kampong Lovers, the town in the neighborhood.
Father: Sorry son, but I have to tell you this. You can't marry any of them because they are your half-sisters.
The son was greatly annoyed by this sudden turn of event. He went to his mother and told her what his father had said. Upon hearing it, the mother smilingly said, "Don't worry son. You can marry any of them; you are not his son."