Oral fixation is a concept from Sigmund Freud's theory of psychosexual development. It suggests that individuals who experience unresolved conflicts during the oral stage of development may develop a strong focus on oral activities, such as eating, smoking, or nail-biting. This fixation can manifest in behaviors that seek comfort or pleasure through the mouth. People with oral fixation may exhibit traits like dependency or a tendency to seek reassurance from others. This behavior can be linked to childhood experiences, particularly those involving feeding and weaning. Understanding oral fixation can help in recognizing certain adult behaviors and their potential origins.