Pediatricians say you should but it's okay if you don't. The hospital says, "Breast is best," but sends you home with formula "just in case." Your sister-in-law says, "Of course you should " Your mother says, "I didn't, and you turned out just fine." Celebrities are photographed nursing in public, yet breastfeeding mothers are asked to cover up in malls and on airplanes. Breastfeeding is a private act, yet everyone has an opinion about it. How did feeding our babies get so complicated?

Journalist and infant health advocate Kimberly Seals Allers breaks breastfeeding out of the realm...