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== Innervation ==The penis — the organ of copulation — is heavily innervated with afferent<ref>{{REFweb |url=https://medical-dictionary.thefreedictionary.com/afferent |title=Afferent |last=Anonymous |first= |init= |publisher=The Free Dictionary by Farlex |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=Cepe da-Emiliani |first= |init=A |author-link=Alfonso Cepeda-Emiliani |last2=Gándara-Cortés |first2= |init2=M |author2-link= |last3=Otero-Alén |first3= |init3=M |author3-link= |last4=García |first4= |init4=H |author4-link= |last5=Suárez-Quintanilla |first5= |init5=J |author5-link= |last6=García-Caballero |first6= |init6=T |author6-link= |last7=Gallego |first7= |init7=R |author7-link= |last8=García-Caballero |first8= |init8=R |author8-link= |etal=no |title=Immunohistological study of the density and distribution of human penile neural tissue: gradient hypothesis |trans-title= |language= |journal= Int J Impot Res |location= |date=2023-05-02 |volume=35 |issue=3 |article= |page= |pages=286-305 |url=https://www.nature.com/articles/s41443-022-00561-9 |archived= |quote= |pubmedID=35501394 |pubmedCID= |DOI=10.1038/s41443-022-00561-9 |accessdate=2023-11-24}}</ref> The penis may be innervated by both dorsal and perineal nerves.<ref name="cepeda2023" />{{LINKS}}* {{REFbook |last=Quartey |first= |init=JKM |author-link= |year=2006 |title=Anatomy and Blood Supply of the Urethra and Penis |url=https://link.springer.com/content/pdf/10.1007/3-540-29385-X_3.pdf |work=Urethral reconstructive surgery |editor= |edition= |volume= |chapter=Chapter Three |scope= |page= |pages=12-17 |location= |publisher=Springer |ISBN= |quote= |format=PDF |accessdate=2023-11-08 |note=}}
Relocate section.
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]].<ref name="farlex2003" />
The normal [[intact]] penis is enveloped by a tube of loose , highly innervated , movable , erogenous skin, the [[foreskin]] or prepuce, which enables it to expand freely during [[erection]]. The skin ends just behind the [[glans penis]] but folds forward to cover it, this forming the [[preputial sac]]. The inner surface of the foreskin contains glands that secrete a lubricating fluid that mixes with exfoliated tissue to form [[smegma]] which makes it easy for the penis to expand and retract past the [[foreskin]].== Innervation ==The penis — the organ of copulation — is heavily innervated with afferent<ref>{{REFweb |url=https://medical-dictionary.thefreedictionary.com/afferent |title=Afferent |last=Anonymous |first= |init= |publisher=The Free Dictionary by Farlex |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=Cepe da-Emiliani |first= |init=A |author-link=Alfonso Cepeda-Emiliani |last2=Gándara-Cortés |first2= |init2=M |author2-link= |last3=Otero-Alén |first3= |init3=M |author3-link= |last4=García |first4= |init4=H |author4-link= |last5=Suárez-Quintanilla |first5= |init5=J |author5-link= |last6=García-Caballero |first6= |init6=T |author6-link= |last7=Gallego |first7= |init7=R |author7-link= |last8=García-Caballero |first8= |init8=R |author8-link= |etal=no |title=Immunohistological study of the density and distribution of human penile neural tissue: gradient hypothesis |trans-title= |language= |journal= Int J Impot Res |location= |date=2023-05-02 |volume=35 |issue=3 |article= |page= |pages=286-305 |url=https://www.nature.com/articles/s41443-022-00561-9 |archived= |quote= |pubmedID=35501394 |pubmedCID= |DOI=10.1038/s41443-022-00561-9 |accessdate=2023-11-24}}</ref> The penis may be innervated by both dorsal and perineal nerves.<ref name="cepeda2023" />{{LINKS}}* {{REFbook |last=Quartey |first= |init=JKM |author-link= |year=2006 |title=Anatomy and Blood Supply of the Urethra and Penis |url=https://link.springer.com/content/pdf/10.1007/3-540-29385-X_3.pdf |work=Urethral reconstructive surgery |editor= |edition= |volume= |chapter=Chapter Three |scope= |page= |pages=12-17 |location= |publisher=Springer |ISBN= |quote= |format=PDF |accessdate=2023-11-08 |note=}}
==Parts==
}}</ref> Non-retractile foreskin is the more common condition until about 10-11 years of age.
{{REF}}