Final answer:
According to Freud, Ingrid's preference for kissing over sexual intercourse can be explained by fixation in the phallic stage of psychosexual development.
Step-by-step explanation:
According to Freud, Ingrid's pursuit of sexual gratification through kissing rather than sexual intercourse can be explained by the concept of fixation in the phallic stage of psychosexual development.
In Freud's theory, the phallic stage occurs between the ages of 3 and 6, during which children become aware of their bodies and recognize the differences between boys and girls. This stage is characterized by a strong focus on the genitals and a conflict involving a child's desire for the opposite-sex parent.
If the conflict in the phallic stage is not successfully resolved, a person may become fixated at this stage and develop personality traits related to an unresolved desire for the opposite-sex parent. Ingrid's preference for kissing over sexual intercourse can be seen as a manifestation of this fixation.