[M]y favorite ad hominem attack of the week came from a blogger who read my Time essay on children and happiness and wrote: “Dr. Gilbert is a very bitter and misguided man who needs to experience fatherhood before he again attempts to write with authority on the subject.” Yes, it was painful for me to learn that I am bitter and misguided. But it was even more painful to learn that I am not a father. I called my 30 year old son to give him the bad news, and he too was chagrined to find that we are unrelated.

Daniel Gilbert, ‘Tears in the Wayback’, July 24, 2006