cute kid moment

here is a conversation from this morning:
Luke: (singing) Mary had a little lamb, little lamb. (Stops singing) Mom, is that the Mary that had baby Jesus?
Me: no honey its a different Mary.
Luke: well who is it then?
Me: i don't know, some little girl named Mary.
Luke: How do you know its not Jesus mother Mary?
Me: I just know, there are lots of people named Mary.... like your Aunt Mary.
Luke:oh whatever.... (and walks away)