In ancient times, it was often interpreted as a metaphor for being capricious or used to playing tricks. However, later generations have sexual meanings because of the story of Zhuang Xiang meeting the goddess of Wushan, such as going to Wushan together, making clouds and distributing rain. When describing sex, two people fall in love and have a variety of tricks. Modern human utility mostly refers to sex. Idle houses are defined as: also called "idleness". The general meaning is: ordinary; Usually relaxed; Whatever. The meaning of the combination is that sex has always been considered as a sparse and ordinary thing.