Later they became an instrument of sex education. When girls married, their parents would not forget to place a few erotic pictures in the bottom of their trousseau chests for reference on the wedding night.
後來被當成一種性教育工具，嫁女兒時，父母總不忘在陪嫁的箱底放幾張春宮畫，作為新婚之夜的參考藍圖，以便依樣畫葫蘆。