在1778年,瑪麗皇后的其中一位兄長約瑟夫二世前來拜訪他們,然後他在寫給利奧波德二世(他們倆人的兄長)的信中寫道: (節錄維基百科原文) ......Louis XVI had confided in him the course of action he had been undertaking in their marital bed; saying Louis XVI "introduces the member," but then "stays there without moving for about two minutes," withdraws without having completed the act and "bids goodnight."