“ Previous studies on the effectiveness of these drugs focused
on the cavernosal tissue, or penis. The internal pudendal artery
actually feeds the penile artery which is buried deep in the penis where numerous caverns enable it
to be flaccid when not engorged with blood.
Physical stimulation of the area causes the tissue, endothelial cells and nerves to release nitric oxide, a powerful dilator
of blood vessels. The system works pretty much the same way in the vagina and clitoris.
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