Anatomy textbooks may need to be rewritten: the main erogenous zone of the penis is not where we thought it was
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The most detailed neuroanatomical study of the penis to date has identified its primary erogenous zone as the frenular delta, an area long omitted from anatomy textbooks and surgical training. The triangular shaped zone is located on the ventral or underside of the penis where the head meets the shaft and can be damaged by circumcision.
“Although this may seem obvious to anyone who is attuned to the sensations of their penis during sexual activity, our work scientifically confirms the existence of a ventral anatomical region of the penis that serves as a center for sexual sensation,” write the authors of the study led by Alfonso Cepeda-Emiliani at the University of Santiago de Compostela in Spain.
Based on this scientific validation, the frenular delta should be considered the “male G-spot” of the penis, he says Eric Chung at the University of Queensland in Australia and president-elect of the International Society for Sexual Medicine, who was not involved in the study. “It is one of the most pleasant places for male sexual stimulation.”
Cepeda-Emiliani and his colleagues painfully mapped the sensory nerves in 14 cadaveric penises from donors who died between the ages of 45 and 96. To do this, they cut the penises into thin sections, each just a few micrometers thick, and added special dyes that bind to the nerves. The sections were then examined under a microscope.
In anatomy textbooks and online sex guides, the primary site of male genital sensation is usually called the glans, the bulbous head of the penis. But Cepeda-Emiliani’s team found evidence that the frenular delta is more sensitive because it contains a higher density of nerve endings.
They also found that the frenular delta contains the highest concentration of sensory corpuscles, specialized touch receptors made from bundles of nerve endings. These bodies are densely clustered in groups of up to 17 in the frenular delta, while in the glans they are isolated and spread out. Among the sensory corpuscles of the frenular delta are the corpuscles of Krause, which have previously been found to detect tiny vibrations that ripple through the genitalia when skin rubs against skin, mediating sexual pleasure.
The frenular delta was appointed Ken McGrath at Auckland University of Technology, New Zealand in 2001. He named it delta because of its triangular shape that sits between the wings of the V-shaped glans on the underside of the penis. At its point is the frenum, a small bridge of skin that connects the foreskin to the penis. McGrath was the first to call the frenular delta the male G-spot because it is a pleasure zone similar to the female G-spot, but the terminology did not catch on.
The latest study supports the subjective experiences of those for whom stimulation of this so-called G-spot generates “intensely pleasurable and highly specialized sensations,” write Cepeda-Emiliani and colleagues. The fact that it has generated so little interest in the past “underscores persistent blind spots in sexual medicine and urology,” they add.
Clinicians performing circumcisions should be educated about the nerve-rich frenular delta because some techniques make cuts throughout the area to remove the foreskin, they say. This can affect his complex neural networks and reduce sexual sensations if the cuts are deep the entire bridle is removedrather than leaving some or all in place.
Kesley Pedler from Port Macquarie Base Hospital in Australia says she was not taught about the frenular delta and its special nerves during her surgical training. “The frenular delta is not mentioned in the most respected textbooks of urologic surgical anatomy, even in the most current editions,” he says. Pedler only performs circumcisions when they are medically necessary, such as when the foreskin is too taut, but he says that “now that we know about this area of nerves, it’s even more important to do these operations only when they’re absolutely indicated.”
Only a small proportion of male children are optionally circumcised in the UK and Australia, but approx half will undergo the procedure in the US. Whether it later alters or dampens sexual sensation is debatable.
One large study in Belgium found that uncircumcised men reported more sexual pleasure from stimulation of their frenular delta than circumcised men. On the other hand, an American survey found no difference in orgasm quality between circumcised and uncircumcised individuals, suggesting that the circumcised penis may have ways of compensating for any neural disruption in the frenular delta region.
The female G spot has also struggled to gain widespread medical acceptance among some doctors denies its existence. This is because no clear clusters of nerves or sensory bodies have been found in its presumed position in the cadaver’s vaginas. But most of the women interviewed report that they have erogenous zone a few centimeters inside the vagina along the front wall. Ultrasound studies have revealed that during sexual arousal, the nerve-rich inner part of the clitoris becomes congested. pressing on the vaginal wallwhich may explain the sensitive G spot.
Cepeda-Emiliani and his colleagues say they are now conducting a similar in-depth study of dead vaginas and clitorises.
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