It's... a lot. One-hundred and twenty four chapters. That's either a good thing or a bad thing depending on what you're looking for. I'm maybe 10% of the way through the book at the time of this review, but I'm here typing because I'm just too excited to say something good about the Collins's writing.
Simone and Malcolm Collins consistently provide a thorough, well-researched, hyper-intellectual teardown for all of their content, and this book is no exception. It's difficult to power through any of their books in one sitting. Any given chapter might turn my world on its head, and I need to pause the book and chew on the content for a while before returning to the work.
In their "Pragmatist's Guide" series, Simone and Malcolm provide practical advice on achieving specific goals. Here's a goal you might want, here's the current state of the world, and here's how you might go about pursuing your goal in such a world. "The Pragmatist's Guide to Sexuality" is not that. Everyone else seems to be having a good time, and Simone and Malcolm want to know /why/.
For example: Early in the book, Simone and Malcolm assert that arousal is the opposite of disgust. A kink is just a very specific exception in a person's disgust system, and those exceptions are somehow erotic. Just as disgust is involuntary, so too is arousal.
While there seems to be no clear goal of the book, the implications of their findings are still very helpful. For example, if you have a weird kink (I definitely have at least one weird kink), you can depersonalize yourself from any shame around it. Everyone has a weird kink, kinks seem to be unchangeable, and arousal is involuntary. Your personal responsibility is in how, who, and when you engage in the kink with; but because the kink is involuntary, you can release all your shame around having the kink.
Again, this is just the content from the opening of the book. There's so much more here than just this.
Knowledge is power, and this is entirely too much knowledge.