According to Lacan and Freud, the pervert does not give up φ for Φ, and therefore retains his jouissance and his position as the instrument of the Other‘s jouissance. The shift of (-φ) (lowercase phi) as phallic image from one side to the other of the equation between the imaginary and the symbolic renders it positive in any case, even if it fills a lack. Although it props up (-1), it becomes Φ (capital phi) there, the symbolic phallus that cannot be negativized…
Phobia, then, is a strategy that bolsters an inadequate paternal function. In Seminar IV, Lacan said that the phobic object is the phallic signifier (Φ), ―a phallus that takes on the value of all signifiers, that of the father if need be‖ (1957/1994, p. 425). In the Écrits, For instance, the masochist demands that his partner punish him and ―force‖ him to do certain things—things which are particular to the coordinates of desire of the individual masochist and thus elicit his own jouissance. Another such trend, upon which I will first elaborate, is that the pervert‘s partner who plays the role of Other is often as fungible and as short term as is the obsessive‘s object a. Perverts are fixated on the oral drive (for example, drinking in my case!), and also fascinated by writing and recording their deeds. They demand instant gratification.The perverse act is situated at the level of jouissance; the hysterical act at the level of desire.
>sexual fantasy as attested to by porn?
The psychoanalytic treatment of a pervert does not set as its objective the elimination of perverse behaviour.
The pervert knows that the Big Other wants... I knew Catherine James (and later women) were my soulmates. The problem was that they didn't seem to know it! Unfortunately, they don't have their own desires.