There are a number of alternative theories to essentialism. An anthropologist, for example, believes that human behavior is greatly affected by the culture and environment in which he is raised.
Touch. Touch is one of the best-developed senses at birth -- and it's absolutely crucial to bonding. Cuddling your baby will make him feel warm and secure, as will swaddling because it re-creates the confined feeling of the womb. And, yes, babies explore through touch, and their preferred tool is their mouth.
This domain in human development is when physical strength is built up, a sense of balance is learned, coordination evolves and motor skills are developed. The five senses of sight, taste, hearing, touch and smell also develop within the biological domain.