I don't believe I have posted this before, but I seriously suggest reading this book:
http://www.amazon.com/Billion-Wicked.../dp/0525952098
It's relatively new and basically taking Kinsey to the next level, and is beginning to be referenced to, as fact.
And, it is based on an academic study of sexuality in relationship to neuropsychology, which has not yet been done before. It explains EVERYTHING we're talking about here, in terms of key points, internal body maps, and various other things which can be described as essentially systems that exist in our minds.
It is too much to explain here, but if you're hesitant to buy an e-book, this Google Talk covers it on a high level:
I don't generally promote something as being "pretty much right" but this is really good and goes along with what I thought all along (but is much more thorough). In comparison, Blanchard's work is like inventing the wheel versus creating a Ferrari.
Watch or read it if you like.
