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A major reason for the lack of popularity of Freud's theory of sexuality among American sex researchers is the fact that there were no empirical data to support his ideas
What is Freud's theory of sexuality?
In his theory, Freud identified five psychosexual stages—the oral, an.al, phallic, latency, and genital stages—during which personality development in childhood occurs. There are various ways and body parts used during each stage to express sexual energy (libido).
These stages are referred to as psychosexual because they each show how libido, which is loosely defined as sexual drives or instincts, fixates on a different part of the body. Some body parts, such as the erogenous zones, become more significant as a person develops physically as potential sources of annoyance, pleasure, or both (erogenous zones).
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