In many ways, parenting newborns seems instinctual.
We see a little baby, and we want to hold her. Snuggle and kiss her. Even just her smell seems magical.
Many of us think breast-feeding is similar.
"I had that idea before my first child was born," says Brooke Scelza, an evolutionary anthropologist at the University of Los Angeles, California. "I definitely thought, 'Oh, I'm going to figure that out. Like how hard can it be?' "