"It is, perhaps, ironic that the legacy of the 'sex wars' that divided feminists in the 1970s and 1980s should be a vibrant, rich, and diverse body of lesbian erotic art. It is also worthy of note that no comparable body of work produced by heterosexual women exists." -- Tamsin Wilton, in the gbltq encyclopedia entry, Erotic and Pornographic Art: Lesbian (third page).
A related quote from the first page of the entry: "The commercial failure of soft porn magazines aimed at heterosexual women suggests that there is widespread ignorance about what arouses women, and a substantial body of sexological research suggests that this ignorance extends to women themselves."