Folk love songs in China often bear the names of brothers and sisters. Is it the tradition of consanguineous marriage handed down from ancient times?

When people in China are in love, they like brothers and sisters to call each other lovers. I think this is a relic of consanguineous marriage in primitive society. Don't you see that many folk songs are full of scenes of "brotherly love"?

In fact, this situation is reflected in ancient and modern China and foreign countries. The "Fuxi Nuwa" created in China mythology is brother and sister, and Sarai, Abraham's wife in the Bible, is also his sister. As for the examples of brother and sister getting married in Greek mythology, there are even more. But westerners are more open, so they just call them "dear" and "sweetheart". China people defend themselves, so he chose such an ambiguous and intimate name.