《淮南子·本经训》
还有社会中男女都有情欲，且异性相吸引起情感冲动，这样男女混杂不加分隔就会引起淫乱，这时便要借助 礼 来限制男女交往。
阴阳之情莫不有血气之感，男女群居杂处而无别，是以贵礼。
There are also men and women in society who have desires, and the attraction of the opposite sex arouses emotional impulses. In this way, men and women are mixed together without separation, which will lead to promiscuity. At this time, it is necessary to use etiquette to restrict the interaction between men and women.