Female sexuality has always been theorized within masculine parameters. Thus, the opposition "viril" clitoral activity/"feminine" vaginal passivity which Freud -- and many others -- claims are alternative behaviors or steps in the process of becoming a sexually normal woman, seems prescribed more by the practice of masculine sexuality than by anything else. For the clitoris is thought of as a little penis which is pleasurable to masturbate, as long as the anxiety of castration does not exist (for the little boy), while the vagina derives its value from the "home" it offers the male penis when the now forbidden hand must find a substitute to take its place in giving pleasure.
According to these theorists, woman's erogenous zones are no more than a clitoris-sex, which cannot stand up in comparison with the valued phallic organ; or a hole-envelope, a sheath which surrounds and rubs the penis during coition; a nonsex organ or a masculine sex organ turned inside out in order to caress itself.
Woman and her pleasure are not mentioned in this conception of the sexual relationship. Her fate is one of "lack," "atrophy" (of her genitals), and "penis envy," since the penis is the only recognized sex organ of any worth. Therefore she tries to appropriate it for herself, by all the means at her disposal: by her somewhat servile love of the father-husband capable of giving it to her; by her desire of a penis-child, preferably male; by gaining access to those cultural values which are still "by right" reserved for males alone and are therefore always masculine, etc. Woman lives her desire only as an attempt to possess at long last the equivalent of the male sex organ.
All of that seems rather foreign to her pleasure however, unless she
"Ce sexe qui n'en est pas un" [This sex which is not one] in Ce sexe qui n'en est pas un ( Minuit, 1977). This and the following essay by Luce Irigaray are from the same volume. The title is, of course, a pun: woman's sex is not a sex within the Freudian paradigm and within Irigaray's paradigm it is not one but multiple, plural.