Talking about royalty, an historical anecdote: King Luis XIV, arguably the brightest of the Bourbon kings, liked to challenge his court members. So one day he called the court fool and said: "I have a challenge for you. I want you to perform an act such that your excuse for it will be worse than the act itself".
Some time later, at a royal ball, the fool comes behind King Louis XIV, and grasps the ass of His most Christian Majesty, the King of France. "What are you doing, you fool?" the King inquires. "A thousand apologies your Majesty" the fool replies, "I thought it was her Majesty, the Queen"