Thank you. I've read some of Lisa's works, including "Between the Sexes: Foundations for a Christian Ethics of Sexuality." I put down "Sex, Gender, and Christian Ethics" after the introduction. In my view, Cahill remains within the circle of academic theologians who have to show how their views coincide or build upon the tradition, including scripture, Aquinas, etc. She's trying to provide a woman-positive "foundation" for Christian Ethics and Morality, but not getting into the questions and issues that concern most sexually-active people -- most of whom don't care what Aquinas had to say about sex. 
Again in my view, I think until the Church learns how to speak about sex at the level of the questions we all have to deal with, theologians will continue to write books and engage one another in footnotes. But the teenagers at the drive-in won't pay any attention, because they're not speaking their language. - Monica.