Why do we say “Head over heels”?

Do a somersault and your heels end up over your head. In the 1300s, English speakers said it the sensible way: “heels over head.” The flipped version was in print by 1771. In 1833, an Indiana newspaper wrote that a woman “fell head over heels in love,” and love has been the classic way to go topsy-turvy ever since.