Saucy for the 16th century I guess. Atlas Obscura has the story. If you wear floor-length dresses the temptation for the height-challenged to wear platform shoes must be irresistible. How did men get to enhance their height?

The flap books discussed appear in an exhibition at the New York Public Library’s 5th & 42nd main building, Love in Venice.

See also Book plus, where there’s link to yet more flap examples shown by Atlas Obscura.