Bill Clinton famously lied about his affair with Monica Lewinsky, while earlier philandering U.S. presidents never had to lie about their affairs, because nobody ever asked.

• 美国前总统比尔·克林顿在同莫尼卡·莱温斯基的绯闻谎言曾经臭名昭著，但是早他之前的那些沾花惹草的美国总统们为什么就从来没有在这种问题上撒谎呢?就是因为从来没有人就此有过质问。