Prince William was playing a game of poker with his wife. The Dutchess was getting frustrated at losing so she decided to get her tits out to distract him. The Prince looks straight at them, smiles gets up and pisses on all his playing cards and shouts "I've won darling!".
Bemused the Dutchess replies "How come?". The Prince looking smug says "Well a Royal Flush beats a pair".
Joke by Mr_Pun