Marriage Jokes - Joke 5

Son

A boy says, "Daddy, Daddy, I want to get married!" The father says, "For that son, you have to have a boy and a girl." The son says, "I've found a girl." "Who?" "My grandmother." "Let me get this straight," the father says. "You want to marry my mother? You can't do that." "Well, why not?" the son says. "You married mine!"