In the other aspect of Freud work was his theory on the psychosexual stages McLeod (2008), states that in 1905 Freud proposed the psychological development in childhood takes place in a series of fixed stages, the reason why it is called psychosexual stages is because each stage represents the fixation of libido on a different area of the body (McLeod, Psychosexual: Simple Psychology, 2008). Freud stressed that the first five year of life are crucial to the formation of adult personality, if each stages are not controlled properly it can cause a conflict at each stage of the psychosexual stage, if these conflicts are not resolved before the individual can successfully advance to the next stage (McLeod, Psychosexual: Simple Psychology, 2008). Both frustration and overindulgence may lead to what psychoanalysts call fixation refers to the theoretical notion that a portion of the individual libido has been permanently invested in a particular stage to his development (McLeod, Psychosexual: Simple Psychology, 2008). The first stage in the psychosexual stages of development is the Oral stage, Freud went on to describe this stage which occurs during the ages of 0-1 years when the libido is centered in a baby 's mouth where it gets much satisfaction from putting all sorts of things in its mouth to satisfy the libido which is the demand from the id (McLeod, Psychosexual: Simple Psychology, 2008). Freud said Oral stimulation could lead to an oral fixation later in life which are