I saw your post last night and dug out my "The Gift of Sex" book (which, BTW, is a great "how to" book on sex - it is labelled as a Christian guide but VERY little of it is religious in tone). It's by Clifford and Joyce Penner. Anyway...it has a wonderful chapter on female sexual response, and here are some quotes:
"Excitement can result from either physical or emotional stimulation. When this stimulatino is received and enjoyed, sexual arousal produces external and internal changes. Dealing first with the external or phsyical genitalia, we note that the clitoris is probably the most important organ during the excitement phase. The clitoris is a unique organ in the human anatomy in that its only purpose is the receiving and transmitting of sexual stimuli. With arousal, the clitoris becomes engorged or enlarged, just as the penis becomes erect. The clitoris increases in length and in size by two or three times. Hunger for clitoral stimulation may result. Most women report that the caressing of the general area around the clitoris is more desirable than having the head, or glans, of the clitoris directly manipulated." (I agree!)
Okay, so it doesn't sound like rocket science but DANG is that clitoris a fascinating little organ or what?!
The "Gift of Sex" book talks a LOT about your questions, English_Gent. I recommend picking up a copy - it helped my H a lot with his "technique" when he read it a few years ago. Here's a link to it (cheap) on half.com: