Boy aged 4: "Dad, I've decided to get married."
Dad: "Wonderful! Do you have a girl in mind?"
Boy: "Yes...grandma! She said she loves me, I love her, too...and she's the best cook and storyteller in the whole world!!!"
Dad: "That's nice, but we have a small problem there..."
Boy: "What problem?"
Dad: " She happens to be my mother. How can you marry my mother??"
Boy : Why not?! You married mine!!!"