“When a baby is hungry, he tends to clench his fists tightly and bring them toward his face. If he falls asleep hungry, his fists usually stay clenched. But when he gets milk, he relaxes starting with his face. Then his shoulders relax, and finally those fists unclench. Eventually they’re as limp as the rest of him. Thing of his hands as a built-in fuel gauge.” p.120 Womanly Art of Breastfeeding