Touch
Certain portions of the infant’s body are more sensitive than others. The tactile sensibility of the lips and tongue is highly developed. This facilitates the process of nursing. The forehead and external auditory meatus are more sensitive than other parts. This creates a necessity for protection of these parts. The child’s head should be covered, but not the face, when taken out of doors. Touch is less acute in the infant than in the older child.
The tongue of the young infant is very susceptible to temperature. He will show a dislike for the bottle if the milk is too hot or too cold.