Thumbs and trunks sucking

There is something that baby mammals always do: suck their thumbs (or trunks in case of elephant). Several benefits have been associated with thumb-sucking: it relaxes babies, it slows down heart and breathing rates and regulates stomach muscle movements. Thumb- and trunk-sucking is associated with food and mom, and therefore is the most comforting actionContinue reading “Thumbs and trunks sucking”