Amy and Evelyn discuss the topic of mouthing habits, focusing on pacifiers, pens, and nails. They explain the importance of oral stimulation for a baby's development and the impact of persistent mouthing habits on older children and adults. They provide insights into the factors contributing to mouthing habits and emphasize the need to address the underlying source of the habit. Amy and Evelyn also discuss the appropriate age to wean a child off a pacifier and stress the importance of recognizing the social and emotional factors associated with mouthing habits.