Depriving him of the breast, could lead to serious problems in his personality development.

剥夺他的乳房，可能会导致他的人格发展出现严重问题。

So, Freud believed there were five stages of personality development, and each is associated with a particular erogenous zone.

因此，弗洛伊德认为人格发展有五个阶段，每个阶段都与特定的性欲区相关。