Mouth. And the main tools by which this is achieved is the tongue and the lips.The oral stage is Freud's initially phase of identity improvement. From birth until around year and a half of age, a newborn child's life fixates on his mouth. The fundamental aim of this stage is to fulfill oral want by invigorating the erogenous zone of the mouth. Newborn children are conceived with an extremely all around created feeling of taste, and their mouths are the most complex devices they need to investigate their reality.