The development of personality series aka studying for my exam in style:
Freud made it very clear that our experiences during childhood are extremely important because of the impact they have on our behavior.
Honestly this must be one of the most important aspects of his work, that is also relevant to today's approach. (Not what I'm about to say but just this simple idea.)
He theorized that as we grow up, we go through different emotional and intellectual developmental stages also known as the Psychosexual development in which our experiences either initiate, enhance or alter some behaviors.
Therefore we have (and to me this is where the disturbing parts starts):
The oral stage: 12-18 months = the child's sexual needs are focused on the oral region of the body. They find pleasure by stimulating the oral region.
The anal stage: 2-3 years = the child's sexual needs are focused on the anal region, and they find pleasure by stimulating that area (which apparently means defecating and peeing)
The phallic stage: 3-6 years = the child's desires or libido are focused on their genitalia, they discover the difference between sexes.
The latency stage: 6-12 years = there isn't a particular erogenous zone here, but rather this is a time of transition, the child is focused on relationships and discovers the world throughout their experiences.
The genital stage: 12, 13 + = this one starts in puberty, where physical changes occur as well, is technically the last stage. The teenager is starting to develop sexual interest in people outside the family.