Hex signs are a form of folk art that originated in the Pennsylvania Dutch culture. Though the colorful geometric emblems remain popular in Pennsylvania, they are not used by the local Amish or Mennonite populations. There is some controversy over the true purpose of hex signs. While some folk-art scholars maintain that the signs are purely decorative, they are associated with folk magic, and their designs carry symbolic meaning. A hex sign featuring a horse head is said to protect against what? Discuss