If you only learn one thing about female anatomy, make it this: the clitoris is an iceberg. What you see externally — the small glans peeking out from under the hood — is roughly 10% of the total structure. The other 90% is internal, wrapping around the vaginal canal, and it’s the key to everything.
The Clitoral Iceberg (O’Connell, 2005)
Dr. Helen O’Connell’s landmark 2005 study in the Journal of Urology — cited over 377 times — provided the first complete anatomical description of the clitoris. Her findings revolutionized our understanding:
- Glans: The visible tip, containing approximately 8,000 nerve endings — the most nerve-dense structure in the human body
- Body (shaft): Extends 2-4cm upward from the glans, hidden under the hood
- Crura (legs): Two extensions that branch backward along the pubic bone, 5-9cm each
- Vestibular bulbs: Erectile tissue that flanks the vaginal opening and swells during arousal
Together, these structures form a pyramid shape: the crura form the bottom corners, the bulbs and vagina form the base, the urethra sits in the center, and the body and glans form the top.
The CUV Complex (Jannini & Buisson, 2014)
Published in Nature Reviews Urology, this concept unified our understanding of female orgasm. The Clitourethrovaginal (CUV) Complex describes how three structures function as a single pleasure unit:
- Clitoris (external glans + internal body, crura, bulbs)
- Urethra (and surrounding spongy tissue — the “urethral sponge”)
- Anterior vaginal wall (the belly-side wall of the vagina)
The key insight: Female orgasm is not produced by a single organ. It’s produced by the synergistic activation of this entire complex. When you apply pressure to the anterior vaginal wall, you’re not stimulating the wall itself (which has low nerve density). You’re pressing through the wall to activate the internal clitoral structures and urethral sponge behind it.
What This Means for Technique
Why the “G-Spot” Concept Is Misleading
The G-spot isn’t a button. It’s the area where the anterior vaginal wall overlaps with the densest concentration of internal clitoral tissue. Its location, size, and sensitivity vary between women because the underlying structures vary in size.
Women with larger internal clitoral structures respond more readily to anterior wall stimulation. Women with smaller structures may need simultaneous external stimulation to activate the complex.
Why “Engorgement” Matters
Like the penis, the clitoral structures fill with blood during arousal (engorgement). When engorged, they press closer to the vaginal wall, making them easier to stimulate through the wall. This is why foreplay matters: without sufficient arousal, the internal structures aren’t close enough to the surface for effective stimulation.
Why External + Internal Simultaneous Stimulation Is Powerful
Stimulating the clitoral glans externally while simultaneously pressing the anterior wall internally activates the CUV complex from both sides. This creates a synergistic effect far more powerful than either alone — which is why oral + finger combinations often produce the strongest orgasms.
The Vagus Nerve Pathway (Komisaruk, 2004)
Komisaruk’s fMRI research at Rutgers discovered that cervical (portio) stimulation reaches the brain through the vagus nerve — a pathway completely separate from the spinal cord. This was proven when women with complete spinal cord injuries still achieved orgasm through cervical self-stimulation.
This means deep vaginal stimulation (cervical/portio area) produces orgasms through a different neural pathway than clitoral orgasms. Many women describe cervical orgasms as deeper, more full-body, and more emotionally intense — likely because the vagus nerve connects to different brain regions than the pudendal nerve (which carries clitoral signals).
Practical Application Summary
| Structure | Location | How to Stimulate | Orgasm Character |
|---|---|---|---|
| Clitoral glans | External, under hood | Tongue, fingers (hood retraction technique) | Sharp, focused, quick build |
| G-spot (CUV overlap) | 3-5cm inside, anterior wall | Perpendicular finger pressure, angled penetration | Deep, building, waves |
| Cervix (portio) | 5-10cm inside, anterior | Deep grinding, cowgirl, angled positions | Full-body, emotional, intense |
| Full CUV complex | All of above | Combined external + internal stimulation | Most intense possible |
Related Guides
- How to Make a Woman Orgasm Every Time
- G-Spot Stimulation Guide
- The Orgasm Gap
- Squirting vs Female Ejaculation: The Science
About the Author: Yuto — Sexual Wellness Researcher, Tokyo. Understanding structure changes everything about technique.
