What is the variance of the following returns? 
Definitions:
Psychosexual Stages
Freud's theory that children pass through a series of stages centered on erogenous zones, with successful navigation key to personality development.
Infancy
The early stage of childhood that spans from birth to 2 years, characterized by rapid physical and cognitive development.
Oral Stage
is the first stage in Freud's psychosexual development theory, occurring from birth to about 18 months, where an infant's pleasure centers are in the mouth.
Oedipus Complex
A Freudian concept in psychoanalytic theory that describes a child's feelings of desire for their opposite-sex parent and jealousy and rivalry with their same-sex parent.
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