St Peter answered, “Those are Lie-Clocks. Everyone who has ever been on earth has a Lie-Clock. Every time you lie, the hands on your clock move.”
“Oh...”, said the man. “Whose clock is that?”
“That's Mother Teresa’s”, replied St. Peter. “The hands have never moved, indicating that she never told a lie.”
“Incredible”, said the man. “And whose clock is that one?”
St Peter responded, “That’s Abraham Lincoln’s clock. The hands have moved twice, telling us that Abraham told only two lies in his entire life.”
“Where’s Tony Blair’s clock?” asked the man.
St Peter replied, “We are using it as a ceiling fan.”