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<br><br>
<br><b>=== What Happens to Your Penis As You Age? A Doctor Explains</b>===
formattings
}}</ref> The penis is also known as the '''phallus'''.
The body of the penis consists of three cylindrical-shaped masses of erectile tissue which run the length of the penis. Two of the masses lie alongside each other and end behind the head of the penis. The third mass lies underneath them. This latter mass contains the [[urethra]]. The penis terminates in an oval or cone-shaped body, the [[glans penis]], which contains the exterior opening of the [[urethra]], or [[meatus]].<ref name="farlex2003" /> The final part of the penis is the [[foreskin]], also called the prepuce.
===Foreskin=== The normal [[intact]], [[foreskinned]] penis is enveloped in its tube of folded loose, highly innervated, movable, protective, erogenous skin,<ref name="winklemann1959">{{WinkelmannRK 1959}}</ref> the [[foreskin]] or prepuce, which unfolds to enable the penis to fully expand during [[erection]].<ref name="earp2018">{{REFjournal
|last=Earp
|first=
|DOI=10.1007/s11930-018-0141-x
|accessdate=2024-01-02
}}</ref> The two layers of the foreskin contain [[lymph]] between them to allow lubricated, frictionless [[gliding action]] of the outer skin over the inner skin. The skin ends just behind the [[glans penis]] but folds forward to cover it, this forming the [[preputial sac]] and, if long enough, the [[acroposthion]]. The moist [[preputial sac]] may harmlessly collect oil-bearing [[smegma]], which is helpful in preventing dermatitis.<ref name="birley1993">{{REFjournal
|last=Birley
|init=HDL
|date=2012
|accessdate=2024-09-25
}}</ref> and occurs after [[puberty]].
== Innervation ==
The normal [[foreskinned]] penis — the organ of copulation — is heavily innervated with afferent<ref>{{REFweb
|date=2003
|accessdate=2023-11-24
}}</ref> nerves — meaning that sensation, which is needed for male sexual function, is transmitted to the spinal cord and/or central nervous system. The penis is also innervated by the sympathetic autonomic nervous system (SAMS) and parasympathetic autonomic nervous system (PAMS).<ref name="cepeda2023">{{REFjournal
|last=Cepeda-Emiliani
|first=
|DOI=10.1038/s41443-022-00561-9
|accessdate=2023-11-24
}}</ref> The penis is innervated by both dorsal and perineal nerves.<ref name="cepeda2023" />
The innervation in the tube of [[foreskin]] translates movement and stretching into pleasurable, erogenous sensation.<ref name="garcía-mesa2021">{{REFjournal
|DOI=10.1111/joa.13481
|accessdate=2023-11-26
}}</ref> <ref>{{REFweb
|url=https://intactamerica.org/what-do-the-eyelids-lips-fingertips-the-intact-penis-have-in-common/
|title=What Do The Eyelids, Lips, Fingertips & The Intact Penis Have in Common?
|date=2024-02-17
|accessdate=2024-02-18
}}</ref>
===The frenular delta===
[[Ken McGrath| McGrath]] (2001) described the frenular delta on the ventral side of the penis as the most sensitive part of the penis.<ref>{{REFbook
|last=McGrath
|first=
|init=K
|author-link=
|year=2001
|title= The frenular delta: a new preputial structure
|url=https://www.cirp.org/library/anatomy/mcgrath1/
|work=Understanding Circumcision: A Multi-Disciplinary Approach to a Multi-Dimensional Problem.
|editor=Denniston GC, Hodges FM, Milos MF, editors.
|edition=
|volume=
|chapter=Chapter 11
|pages=199-206
|location=New York
|publisher=Kluwer/Plenum
|ISBN=
|quote=The frenular delta is noted by men as the most sensitive area of their penis, especially in the mid-line nearest the frenulum, and the frenulum itself.
|accessdate=2025-09-30
|note=
}}</ref>
[[Alfonso Cepeda-Emiliani| Cepeda-Emiliani]] et al. (2025) published the most complete review of penile innervation thus far. They confirmed that the frenulal delta is the most erogenously sensitive part of the penis and compared it to the female "G-spot".<ref name="cepeda2025">{{REFjournal
|last=Cepeda-Emiliani
|first=
|init=A
|author-link=Alfonso Cepeda-Emiliani
|last2=Otero-Alén
|first2=
|init2=M
|author2-link=
|last3=Suárez-Quintanilla
|first3=
|init3=J
|author3-link=
|last4=Gándara-Cortés
|first4=
|init4=M
|author4-link=
|last5=García-Caballero
|first5=
|init5=T
|author5-link=
|last6=García-Caballero
|first6=
|init6=R
|author6-link=
|last7=García-Caballero
|first7=
|init7=L
|author7-link=
|etal=no
|title=The sensory penis: A comprehensive immunohistological and ontogenetic exploration of human penile innervation
|trans-title=
|journal=Andrology
|date=2025-09-19
|volume=
|issue=
|article=
|pages=1-41
|url=https://onlinelibrary.wiley.com/doi/epdf/10.1111/andr.70118
|archived=
|quote=
|pubmedID=40970806
|pubmedCID=
|DOI=10.1111/andr.70118
|accessdate=2025-09-30
}}</ref>
|quote=
}}</ref>
==The four functions of the penis==
The four functions of the penis are:
# to be a handy tool for [[urination]] without disrobing.
# to be a a vehicle for reproduction.
# to provide sexual pleasure and sensory function.
# to provide partner satisfaction and friction reduction.<ref>{{REFweb
|url=https://intactamerica.org/key-functions-of-the-penis/
|title=Understanding the Key Functions of the Penis
|last=Cartwright-Smith
|first=Jeffrey
|init=
|author-link=
|publisher=Intact America
|date=2025-09-18
|accessdate=2025-10-02
}}</ref>
----
|issue=
|pages=134-5
|url=httphttps://www.cirp.org/library/normal/wright2/
|quote=The normal prepuce should be left alone, with no attempt to retract it until the boy is able to do it himself, at the earliest at three years of age.
|pubmedID=8295581
A study by the Danish paediatrician and school doctor, [[Jakob Øster]], of 9,545 examinations of pupils, published in 1968, led to the following results<ref>{{OesterJ 1968}}</ref>:
{|border='1' style='text-align:right' cellpadding='2'
!width='15%'|Age
|accessdate=2023-12-29
}}</ref>
==Effect of foreskin restoration==Previously [[circumcised]] men who have [[restored]] their foreskin report that their penis has much more [[Erogenous sensation of the foreskin| sensation]] with a foreskin. == Video Videos ==<br>=== The Penis ===
<youtube>v=4qbUdVk-QvE</youtube>
<youtube>v=2ixNxjJOJu0</youtube>
* [[Circumcision - Penis SensitivityTest]]
* [[Erection]]
* [[Erogenous sensation of the foreskin]]
* [[Foreskin]]
* [[Foreskin sensitivity]]
* [[Glans penis]]
* [[Gliding action]]
* [[Jojoba]]
* [[Meissner's corpuscles]]
* [[Preputial sac]]
{{LINKS}}
* {{REFbook
}}
* {{REFweb
|url=httphttps://www.intactaus.org/information/functionsoftheforeskinfunctions-of-the-foreskin/
|title=Functions of the Foreskin
|last=
|publisher=Intact Australia
|date=
|accessdate=20242025-0107-1427
}}
* {{REFweb
|url=https://intactamerica.org/key-functions-of-the-penis/
|title=The Four Functions of the Penis
|last=Cartwright-Smith
|first=Jeffrey
|init=
|author-link=Jeffrey Cartwright-Smith
|publisher=Intact America
|date=2025-09-28
|accessdate=2025-10-08
}}
{{REF}}
[[Category:Penis]]
[[Category:Genital]]
[[Category:Male sexuality]]