Their normal developmental urges are frustrated.
Oral Fixation is when individual becomes locked into an earlier developmental stage (oral stage/brastfeeding. Fixated in this stage adults could become unusualy interested in oral activities such as eating, talking or smoking.
The phallic stage, age 3 to 6 years.
One of Freud's theories is the theory psychosexual development. It states that people have sexual desires from birth and they develop in stages. There are five stages in Freud's psychosexual theory. From birth to age one, a person is in the "Oral" stage. From age one to age three, a person is in the "Anal" stage. From age three to age six, a person is in the "Phallic" stage. From age six to puberty, a person is in a "Latency" stage. From puberty onward, a person is in the "Genital" stage. Freud says that if one of the stage's desires is not fully met, the person will become fixated on that stage. A person with a fixation on the Oral stage can become either orally aggressive or orally passive. Orally aggressive people often chew gum, or chew on erasers and pencils. Orally passive people often smoke or eat a lot. A person fixated on the Anal stage can become either anal retentive or anal expulsive. An anal retentive person is often extremely neat and organized, whereas an anal expulsive person is careless and disorganized. A person fixated on the Phallic stage can develop an Oedipus or an Electra Complex. A person fixated on the Latency stage will not be fulfilled through sexual interactions. A person fixated on the Genital stage will have unstable relationships and may be impotent.
The phallic stage, age 3 to 6 years.
The latent stage precedes the genital stage.Latency
Latency phase.
Sigmund Freud introduced the concept of fixation in psychoanalytic theory. Fixation can occur when an individual's development becomes stuck at a particular stage, such as the oral, anal, or phallic stage, due to unresolved conflicts or issues.
In psychology, the latency period refers to a stage in Freudian psychosexual development during early childhood where sexual impulses are dormant.
Your question is based upon the formalism of Freudian psychoanalytical theory, and you should bear in mind that even though Freud made very important progress in the study of human psychology, his theories are no longer taken literally by psychologists. It would be more accurate to say that people develop such moral consciences as they may have (if they do not become narcissists with no conscience) in childhood.
By acting on stage
Infants become aware of things and respond to people and objects during the third sensorimotor stage in Piaget's theory, known as the "secondary circular reactions" stage. At this stage (around 4-8 months old), infants start to intentionally grasp objects, imitate actions, and show interest and responsiveness to stimuli in their environment.
In essence, you feel like a different person, because you generally become one. A lot of people are scared on stage or have stage fright, but if you are confident, you become less self-aware and become an entirely new person. It's an amazing feeling and also very fun.