Why should an affair be used to describe a woman's infidelity? Any allusions?

In fact, the earliest source may be the Western Mountain Ghost Cave in the Song Dynasty. There is a poem in it: if you twist a green plum and see a handsome boy, it is like riding apricots out of the wall. Here, women and red apricots are linked together.

The story was formed in the Yuan Dynasty's Immediately Going to the Wall, which described a good girl and a talented girl, two of a kind, but the family did not agree, so the young lady agreed to elope with the scholar who went to the wall. As a result, both of them got married and had children, but the family still disagreed. Until later, after some setbacks, the two rose up against their parents and finally walked together. Originally, many ancient poems used an affair to describe women, but in the book, women and men met against the wall. With the continuous improvement of these materials, women's infidelity is linked to the wall.

In ancient times, the way relatives got married was mainly to consider the right match, and many times they were blind and dumb. Whether men and women can have love like this depends entirely on luck. The difference between men and women is that men can take concubines. If you don't like a wife who is not virtuous and beautiful, you can solve it by concubinage. Women are different, what's more, the law does not support women's divorce, and parents alone can't get by. So some women will risk their lives to cheat. Walls usually represent constraints. Ancient families were generally high-walled courtyards, and a wall blocked women's freedom and cut off contact with the outside world. Cheating means breaking taboos and chains.

Although men and women no longer meet by the wall, this sentence will still be used to describe women cheating. It can be seen that everyone is still greatly influenced by ancient culture and education.