Rules for Thee but not for Me

British History is full of examples of members of the monarchy, namely the males of the Royal House seemingly doing as they wish with their private lives. They would marry for Political and Financial reasons then proceed to lead double lives,they did however make sure the same couldn't be done to them while they continued with their dalliances. 

Anyone who do violate the Kings Companion or the Kings eldest daughter unmarried, or the wife of the Kings eldest Son is committing treason. The penalty shall be death.

Treason Act 1351