There are many reasons for a man to be proud of his grandchildren, as I am of my three, who are beautiful, smart, loving and, even though the eldest is only 4 years old, more mature than their grandfather. Now I can add one more reason: My grandson, Xavier, at the tender age of 4 months, is a Three Stooges fan. I made this delightful discovery recently when my wife, Sue, and I took a road trip to visit Xavier, who lives with his mommy, Katie, and daddy, Dave. The moment of revelation occurred on a sunny morning in Katie and Dave’s bedroom, where I was watching Xavier while everyone else got ready for a day of fun, frolic and, of course, infantile behavior.