In neurosis, the phallus is at the centre of sexuation. It cannot be reduced to an identification, but rather can be conceived of as a function, the phallic function. In psychosis, the foreclosure of the Name-of-the-Father can be correlated to the foreclosure of phallic signification. The relation of the subject to the phallus is not the same as the relation of the subject to just any signifier. For S. Freud, the function of the phallus dates from the phallic phase, when the subject elevates his intimate jouissance to the dimension of a universal signifier, like little Hans’s “widdler”. The symptom and the phallic function can be articulated through the intermediary of the signifier. The phallic function has one side that is real, in the form of jouissance, and one side that is symbolic, in the form of the law and the prohibition represented by castration.