For mares, the rules were more complicated—and the book showed that their customs were no less complicated. Many pages of the book were devoted to different articles of clothing, from complicated lacy pieces which only covered the hips and teats, to long flowing dresses. It was fair to assume that the amount of body one covered, as well as the complexity of that article of clothing, played an important part of their society . . . and she simply didn't know their rules.