
Previous title: We May finally be able to Answer Your Question, Joe
Joe Hillshoist may not have known it, but when he asked, "What is a clitoris?" in jest in 2007, it was actually a timely and appropriate question.
http://rigorousintuition.ca/board2/viewtopic.php?p=53145#p53145
For throughout the entire history of medical science, male researchers, due only to, one might assume, their insidious and pathetic misogyny, had utterly failed to accurately map the whole of the organ, despite performing countless dissections, examinations, X-rays, scans, etc., etc., over hundreds of years.
The only organ known to exist solely to provide pleasure, this is the clitoris:

Internal erect clitoris, front.

Internal erect clitoris, side view.
The external little man in the boat

These discoveries are due to just a few researchers, Helen E. O’Connell. 2005 Report Anatomy of The Clitoris
http://www.artsci.wustl.edu/%7Eanthro/courses/306/articles/oconnell-etal-clitoris.pdf
“The anatomy of the clitoris has not been stable with time as would be expected. To a major extent its study has been dominated by social factors … Some recent anatomy textbooks omit a description of the clitoris. By comparison, pages are devoted to penile anatomy.”
Dr. Odile Buisson and Dr. Pierre Foldès in France.
“When I returned to France to treat genital mutilation, I was amazed that they were never tried. The medical literature tells us the truth about our contempt for women. For three centuries, there are thousands of references to penile surgery, nothing on the clitoris, except for some cancers or dermatology -and nothing to restore its sensitivity. The very existence of an organ of pleasure is denied, medically. Today, if you look at the anatomy books that all surgeons have, you will find two pages above. There is a real intellectual excision. “
http://blog.museumofsex.com/the-internal-clitoris/
The scientific name for the external “little button” or “bulb” is glans. Not to be confused with glands, glans simply refers to a small circular mass. This little structure contains approximately 8,000 sensory nerve fibers; more than anywhere else in the human body and nearly twice the amount found on the head of a penis! From reading her work, it’s clear that Marie Bonepart mistakenly thought that the clitoris was completely comprised of the glans; and because it is super sensitive and all anyone can see of the organ, her confusion is mirrored by most women today. The fact is, though, that most of the clitoris is subterranean, consisting of two corpora cavernosa (corpus cavernosum when referring to the structure as a whole), two crura (crus when referring to the structure as a whole), and the clitoral vestibules or bulbs.
The glans is connected to the body or shaft of the internal clitoris, which is made up of two corpora cavernosa. When erect, the corpora cavernosa encompass the vagina on either side, as if they were wrapping around it giving it a big hug!
The corpus cavernosum also extends further, bifurcating again to form the two crura. These two legs extend up to 9cm, pointing toward the thighs when at rest, and stretching back toward the spine when erect. To picture them at rest, imagine the crura as a wishbone, coming together at the body of the clitoris where they attach to the pubic symphysis.
Near each of the crura on either side of the vaginal opening are the clitoral vestibules. These are internally under the labia majora. When they become engorged with blood they actually cuff the vaginal opening causing the vulva to expand outward. Get these puppies excited, and you’ve got a hungrier, tighter-feeling vaginal opening in which to explore!
What does all this mean? Well, for starters, we can finally end that age-old debate of vaginal vs. clitoral orgasms.
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They're all clitoral orgasms.