Not a sexual ethics book, but I wanted to make sure to read something specifically by a Lutheran on ethics in general. Very good book. I'm a fan of Childs and this book provides an easy to follow method for moral discernment.
Sexuality in the New Testament: Understanding the Key Texts by William Loader
I'll be honest, I don't remember much of this book. Definitely dry. Definitely exegesis. I'm glad I took notes for later perusal.
Body Sex and Pleasure: Reconstructing Christian Sexual Ethics by Christine Gudorf
Full disclosure, Dr. G is my thesis advisor. That said, this is one of my top 3 books so far. Excellent look at Christian ethics from a liberal Christian point of view that is still well informed and well argued. Mutual pleasure is at the heart of the work. I can dig it.
Dirt Greed and Sex: Sexual Ethics in the New Testament and Their Implications for Today by William Countryman
This is the second driest read of the group. It's very good exegetically and connects the dots between purity, property, and sex. I can appreciate his general findings (that anything related to purity laws is not binding on Christians; that most of the sexual injunctions in the Bible have a property right reasoning), but cannot agree with some specific findings (on bestiality and polygamy for instance).
Embodiment: An Approach to Sexuality and Christian Theology by James Nelson
Add this to the canon. It's that good. An excellent look at late 20th century Christian ethics. Only parts of it appear dated (written in 1978, it still has to address some of the "sexual revolution" things). Worth reading by anyone regardless of their level.
In Memory of Her: A Feminist Theological Reconstruction of Christian Origins by Elisabeth Schussler Fiorenza
Excellent excellent excellent. I read this for an overview of her hermeneutics of suspicion methodology. But like I said, I had to read the whole thing. What was very surprising is that she didn't throw out Paul and the seeming "misogynist" authors, but rather embraced them and explained how those excerpts seemingly subordinating women could be reinterpreted based on the social ethos of the time to support a "discipleship of equals."
Sexual Fulfillment: For Single and Married, Straight and Gay, Young and Old by Herbert Chilstrom and Lowell Erdahl
Bingo! Sexual ethics AND specifically Lutheran. Unfortunately this does not live up to Gudorf or Nelson -- but it's also directed at a different audience. No footnotes, no acadespeak, etc. It's a good book if you don't want all that extra stuff. But if you want more than meat and potatoes it might not live up to expectations.
Love Does No Harm: Sexual Ethics for the Rest of Us by Marie Fortune
This is where I'm at now. On chapter 3. So far I am very impressed by her methodology. With rule-based ethic and situation ethic on either pole, she argues for an ethic of moral agency which approaches discernment from principle rather than set in stone rules. I think I'll continue liking this through the end.