In "Trans Sex", Kelvin Sparks offers a detailed look at many topics related to human sexuality from a transinclusive, non-assuming perspective. With a holistic and educative focus, it sheds light on the way different body parts work when under different circumstances, without assuming at any point that they will belong to people who identify with this or that gender. The many different options for transitioning are covered, from both an anatomical and a hormonal point of view, and its effects on a wide range of topics (from how the post-op body works, to desire) are also described.
The book covers the concept of sex itself; the notion of safer sex, versus an ideal of (100%) safe sex; toys and gear; kink, and the different kinds of sex there are. Oral, vaginal, manual and grinding, and anal, are all covered in different chapters, and explained in ways that do not assume what body part, or what role, belongs to whom. One of the most meaningful concepts that this book covered, though, was the idea of authentic consent versus enthusiastic consent. Since the trans* comunity is at a uniquely high risk of all forms of violence, sexual violence included, I found this to be a really important concept both for trans* people themselves, and for potential sexual and/or romantic partners.
As the partner of a transmasc person, I loved having this book. Not only does it provide detailed information into how post-op transmasc bodies on HRT work, but it also provides deep insight into how the different ways to have sexual intercourse are like with such bodies. I was endlessly grateful to have found such a complete source of information that enables me to understand my partner's experience better, as well as to be able to learn quite a lot about how things are for him regarding sexuality. I would recommend this book to everyone, trans* or cis, since the teachings and consent-based lessons it delivers apply to all bodies, and all people.