The AFE Zone Discovery
Researchers investigating vaginal dryness with Magnetic Resonance Imaging found that when the penis head stimulated certain areas of the vagina Subjects experienced wave after wave of intense pleasure resulting in mind blowing super orgasm climaxes. The results were similar to but more intense than G-Spot stimulation.
Sliding the fingers up the front vagina wall you find a rough oval area of ridges. This is the G-spot.
Sliding the fingers halfway up the posterior vaginal wall you will find a larger area which is slightly rougher than the normal vaginal wall. This is the AFE Zone.
This roughness creates the friction and increases the pleasure sensations in both vagina and penis nerves.