He had what they call a "baseball mind," which is another way of saying that he had a plate in his head and a double-digit IQ.
After he abdicated the throne of Cambodia, his official title was "Preah Karuna Preah Bat Sâmdech Preah Norodom Sihanouk Preahmâhaviraksat" - which translated means "Sacred Compassionate Foot Lord Sacred Best Jaws of the Lion Sacred Great Brave Warrior". Yeah. Ok. Whatever.
(d) October 14th, 2012