How are pages 72 and 73, which contain images of mythological characters and fanciful human figures, different than the previous images that are displayed in Chapter 4?

Pages 72 and 73 carry a feeling of fantasy and sensuality that is not present on the other pages. Also, pages 72 and 73 have many images which include male and female nudes in suggestive positions and playful acts, which all seems to be for the pleasure of the viewer; the images are not heavy and somber as in many of the other pages.