I have always fancied myself an honest man; the sort of chap who gives the back the extra change to the cashier and never fudges his debts. But fatherhood, dear reader, is a curious thing. It has transformed me from a principled adult into a compulsive fibber in service of maintaining my four-year-old’s fragile worldview. White lies, you see, have become the currency of my parenthood, and I have…