Developmental update -- Katharine has discovered the question: Why? For those of you who have young children, have raised young children, or have little ones in your lives; I don't think I need to say much more!
As a parenthetical, along with why, has come "why not", "why did you do that" and several other questioning variations. It is definitely a test of a middle-aged parents creativity! (And yes, I often say, "because I said so!")