Szeto told the story of his age recently. (See http://ccszeto.blogspot.com/2011/11/age.html) Let me share mine.
At the dinner after an advisory board meeting, the organizers could not resist the temptation to ask my age. I was so sorry. Evidently, they had expected to invite a more senior person. But then I decided to give a more evasive answer.
I referred to a professor from Beijing and said, “Professor J has known me for years. I can’t be that young.”
The professor of infectious diseases gave an even quicker answer, “I can prove that he is at least twenty.”