As we all know, people in ancient China were often secretive about sex. In ancient times, men and women often got married earlier (men were 20 years old or earlier, women were 16 years old or earlier). However, in this social situation where sex education is severely suppressed, men and women sometimes have less detailed or even no understanding of sex or sexual behavior. Without education, married couples may not know how to have children after three or four years (hehe).
Therefore, in order to make the newlyweds and brides realize the importance of the ceremony of husband and wife, and not go too far with China's conservative and repressive sex education, the old man has come up with many ways. One of them is that the bride has a box in her dowry. At the bottom of this box will be placed books on sex education (such as erotic pictures, pornographic books and periodicals), or small sculptures of characters' sexual behavior carved directly from ceramics and wood. The sex education supplies on this wedding night have gradually evolved into a "closet".
Today, we call "closet bottom" a treasure, "the magic weapon of closet bottom!" Perhaps this is also the legacy of ancient emphasis on newlywed sex education. ("The bottom of the wardrobe" is really important, haha)