Along with being banned from even referring to the bathroom as the 'toilet', King Charles is said to follow a set of strange rules in the lavatory. © Getty Images The King is said to follow several bizarre bathroom rules at homeBizarre bathroom rulesYou apparently won't catch the royals relaxing in the bath with a book or burning candles. According to a list of royal bathroom etiquette rules complied by Express, reading materials and scented candles are a no go. that the members of the royal family never use the word 'toilet', instead preferring 'lavatory' or 'loo'. Kate explained to us that the royals historically avoided using 'toilet' because of its French origins.