Son of No.2：「Mom, what would ass like to see?」
Mother：「Ass? See? Ass cannot see.」
Son：「If ass could not see, why does it has eyes?」
Mother：「Ass has “eyes”? How come?」
Son：「Yes, it is true......., yesterday, Dad taught me “You have to clean the “屁眼” when you take a bath.”」Mother： ………….