Foreskin: Difference between revisions
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<div class='res-img'>[[File:Infographic Foreskin.jpg|Foreskin - Anatomy and function]]</div> | <div class='res-img'>[[File:Infographic Foreskin.jpg|Foreskin - Anatomy and function]]</div> | ||
The word ''foreskin'' is a cognate of the German word ''Vorhaut''. The word ''prepuce'' is a cognate of the French word ''prépuce'', which is derived from Latin ''praeputium''. ''Foreskin'' is more commonally used in speech, while ''prepuce'' is more commonly seen in scientific literature. | |||
The '''foreskin''' or '''prepuce''' is the double-layered fold of smooth muscle tissue, blood vessels, neurons, [[skin]], and [[mucosa| mucous membrane]] part of the [[penis]] that creates the [[preputial sac]], while covering and protecting the [[glans penis]] and the [[urinary meatus]]. | The '''foreskin''' or '''prepuce''' is the double-layered fold of smooth muscle tissue, blood vessels, neurons, [[skin]], and [[mucosa| mucous membrane]] part of the [[penis]] that creates the [[preputial sac]], while covering and protecting the [[glans penis]] and the [[urinary meatus]]. | ||
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}}</ref></blockquote> | }}</ref></blockquote> | ||
==Origin== | ==Origin== | ||
[[Evolution of the foreskin]] over hundreds of thousands of years by natural selection provided better fitness for survival.<ref>{{REFbook | [[Evolution of the foreskin]] over hundreds of thousands of years by natural selection provided better fitness for survival.<ref name="darwin1859">{{REFbook | ||
|last=Darwin | |last=Darwin | ||
|first=Charles | |first=Charles | ||
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|accessdate=2024-12-18 | |accessdate=2024-12-18 | ||
|note= | |note= | ||
}}</ref> Evolution provided protective functions that protect the [[penis]] from [[trauma]], [[infection]],<ref name="fleiss-hodges-vanhowe1998"/> and also provided functions that promote reproduction.<ref name="cold-taylor1999" /> | }}</ref> Evolution provided protective functions that protect the [[penis]] from [[trauma]], [[infection]],<ref name="fleiss-hodges-vanhowe1998"></ref> and also provided functions that promote reproduction.<ref name="cold-taylor1999" /> | ||
== Structure == | == Structure == | ||
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The foreskin is considered to have three parts: | The foreskin is considered to have three parts: | ||
* The outer foreskin which is | * The outer foreskin which is covered with true [[skin]]. | ||
* The inner foreskin and [[ridged band]] which is covered with mucosal membrane. ([[Mucosa]]) | * The inner foreskin and [[ridged band]] which is covered with mucosal membrane. ([[Mucosa]]) | ||
* The [[frenulum]] which connects the foreskin to the [[glans penis]] and usually limits retraction. | * The [[frenulum]] which connects the foreskin to the [[glans penis]] and usually limits retraction. | ||
The inner and outer adult foreskin together contain about 15 square inches of skin. | |||
The foreskin is <i>not</i> redundant tissue.<ref name="andersen2025">{{REFjournal | |||
|last=Andersen-Giberson | |||
|init=D | |||
|author-link=Dale Andersen | |||
|url=https://cdd.journals.yorku.ca/index.php/cdd/article/view/39786/36016 | |||
|title=Circumcision and forced disability: Routine male neonatal circumcision and the consequences of amputation within a critical disability studies framework | |||
|journal=Critical Disability Discourses | |||
|date=2025-12 | |||
|volume=10 | |||
|issue=2 | |||
|pages=1-37 | |||
|URL=https://cdd.journals.yorku.ca/index.php/cdd/article/view/39786/36016 | |||
|DOI=https://doi.org/10.25071/1918-6215.39786 | |||
|accessdate=2026-03-12 | |||
|quote=In a critical disability studies framework, it is argued that the act of amputating healthy erogenous tissue and the consequences of that amputation cause disability, particularly from a counter-hegemonic lens. | |||
|format=PDF | |||
|accessdate=2026-03-12 | |||
}}</ref> | |||
===Foreskin in infancy and childhood=== | ===Foreskin in infancy and childhood=== | ||
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===Foreskin length=== | ===Foreskin length=== | ||
Natural foreskins are found in all lengths from very short to very long. Most appear to fall near the center of the range with very few at the two extremes in accordance with the rules for [https://en.wikipedia.org/wiki/Normal_distribution normal distribution]. | Natural foreskins are found in all lengths from very short to very long. Most appear to fall near the center of the range with very few at the two extremes in accordance with the rules for [https://en.wikipedia.org/wiki/Normal_distribution normal distribution]. [[Long foreskins]] appear to perform their [[Immunological and protective function of the foreskin| protective and immunological function]] more satisfactorily. A short or inadequate foreskin may be lengthened by [[tissue expansion]] to improve function and aesthetics. | ||
The tapered tip of | The tapered tip of [[long foreskins]] that extends beyond the [[glans penis]] is known as the ''[[acroposthion]]''. A very few of the longest foreskins will not remain retracted when released, but will spontaneously [[Gliding action| glide]] forward to recover the [[glans penis]]. [[Long foreskins]] improve protection and [[gliding action]] and do not usually create an issue. There is no recognized definition of an excessively long or so-called "redundant" foreskin.<ref name="tip2022">{{REFweb | ||
|url=http://acroposthion.com/the-tip-at-the-end/ | |url=http://acroposthion.com/the-tip-at-the-end/ | ||
|title=The ‘Tip’ At The End | |title=The ‘Tip’ At The End | ||
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* Foreskin extends beyond head: 6.4%<ref>Gebhard, P. H., Johnson, A. B., & Kinsey, A. C. (1998). Table 81. In: <i>The Kinsey Data: Marginal Tabulations of the 1938–1963 Interviews Conducted by the Institute for Sex Research.</i> Indiana University Press. </ref> | * Foreskin extends beyond head: 6.4%<ref>Gebhard, P. H., Johnson, A. B., & Kinsey, A. C. (1998). Table 81. In: <i>The Kinsey Data: Marginal Tabulations of the 1938–1963 Interviews Conducted by the Institute for Sex Research.</i> Indiana University Press. </ref> | ||
Please note that the last two categories, totalling 54.8%, provide complete | Please note that the last two categories, totalling 54.8%, provide complete coverage of the [[glans penis]]. | ||
<i>See [[Development_of_retractable_foreskin#Adult_foreskin| Adult foreskin]].</i> | <i>See [[Development_of_retractable_foreskin#Adult_foreskin| Adult foreskin]].</i> | ||
==Physiological functions== | ==Physiological functions of the foreskin== | ||
Antique research by Alfred Kinsey (1948)<ref>{{REFbook | Antique research by Alfred Kinsey (1948)<ref>{{REFbook | ||
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The foreskin functions as a hose nozzle during [[urination]]. It confines and consolidates the multiple urine streams from the [[urethra]] into one stream that can easily be controlled and aimed as necessary. | The foreskin functions as a hose nozzle during [[urination]]. It confines and consolidates the multiple urine streams from the [[urethra]] into one stream that can easily be controlled and aimed as necessary. | ||
[[Foreskinned]] men advise that the foreskin should be stretched out to its full length to remove wrinkles before commencing [[urination]]. | [[Foreskinned]] men advise that [[Urination by foreskinned men| the foreskin should be stretched out to its full length]] to remove wrinkles before commencing [[urination]]. | ||
=== Erection functions === | === Erection functions === | ||
When [[erection]] of the [[penis]] occurs, the penis also expands in both circumference and length, so more skin is needed to cover it and allow painless erection. The foreskin unfolds to provide additional skin and permits [[intact]] men to enjoy painless erection, unlike many [[circumcised]] men who experience very tight, painful skin when [[erection]] occurs. | When [[erection]] of the [[penis]] occurs, the penis also expands in both circumference and length, so more skin is needed to cover it and allow painless erection. The foreskin unfolds to provide additional skin and permits [[intact]] men to enjoy painless erection, unlike many [[circumcised]] men who experience very tight, painful skin when [[erection]] occurs. | ||
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}}</ref> | }}</ref> | ||
The foreskin continues to protect the [[glans penis]] throughout life, keeping it smooth, glossy, moist, [[Foreskin sensitivity| sensitive]], and free from [[keratinization]] and loss of sensation. | The foreskin continues to protect the [[glans penis]] throughout life, keeping it smooth, glossy, moist, [[Foreskin sensitivity| sensitive]], and free from [[keratinization]] and loss of sensation. Nature intended the glans penis to be an internal organ that is only exposed briefly. Many men prefer having a foreskin that fully covers and protects the sensitive [[mucosa]] of the glans penis. | ||
=== Immunological functions === | === Immunological functions === | ||
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The prepuce provides a large and important platform for several nerves and nerve endings. The innervation of the outer skin of the prepuce is impressive; its sensitivity to light touch and pain are similar to that of the skin of the penis as a whole.<ref name="taylor1996" /> | The prepuce provides a large and important platform for several nerves and nerve endings. The innervation of the outer skin of the prepuce is impressive; its sensitivity to light touch and pain are similar to that of the skin of the penis as a whole.<ref name="taylor1996" /> | ||
</blockquote> | </blockquote> | ||
Sorrells et al. (2007) conducted a fine-touch study of the penis of both [[circumcised]] and [[intact]] men. Sorrells et al. concluded: | Sorrells et al. (2007) conducted a fine-touch study of the penis of both [[circumcised]] and [[intact]] men. Sorrells et al. concluded: | ||
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|DOI=10.1111/joa.13481 | |DOI=10.1111/joa.13481 | ||
|accessdate=2021-11-15 | |accessdate=2021-11-15 | ||
}}</ref> | |||
Vega et al. (2025) reported that the number of Meissner's corpuscles vary with age with the highest number being found between the ages of 20 and 40.<ref>{{REFjournal | |||
|last=Vega | |||
|first= | |||
|init=JA | |||
|author-link= | |||
|last2=Aiello | |||
|first2= | |||
|init2=V | |||
|author2-link=Vincenzo Aiello | |||
|last3=Martin-Cruces | |||
|first3= | |||
|init3=J | |||
|author3-link= | |||
|last4=Suazo | |||
|first4= | |||
|init4=I | |||
|author4-link= | |||
|last5=Jones | |||
|first5= | |||
|init5=R | |||
|author5-link= | |||
|last6=Musa | |||
|first6= | |||
|init6=W | |||
|author6-link= | |||
|last7=Szebeni-Varga | |||
|first7= | |||
|init7=B | |||
|author7-link= | |||
|last8=Garcia-Suảrez | |||
|first8= | |||
|init8=O | |||
|author8-link= | |||
|last9=Garcỉa-Mesa | |||
|first9= | |||
|init9=Y | |||
|author9-link= | |||
|etal=no | |||
|title=Sexual Mechanosensitivity: Age-Related Changes in the Innervation of the Human Prepuce | |||
|trans-title= | |||
|journal=J Clin Med | |||
|location= | |||
|date=2025-07-04 | |||
|volume=14 | |||
|issue=13 | |||
|page=4730 | |||
|url=https://www.mdpi.com/2077-0383/14/13/4730 | |||
|archived= | |||
|quote= | |||
|pubmedID=40649104 | |||
|pubmedCID=12250474 | |||
|DOI=10.3390/jcm14134730 | |||
|accessdate=2025-07-31 | |||
}}</ref> | }}</ref> | ||
== Sexual behavior == | == Sexual behavior == | ||
The foreskin is a source of comfort to [[foreskinned]] men that is not available to [[circumcised]] men. | The foreskin is a source of [[Body pleasure| comfort]] to [[foreskinned]] men that is not available to [[circumcised]] men. | ||
Laumann et al. (1997) reported that men who lack a foreskin "engage in a somewhat more elaborated set of sexual practices than do men who are not [[circumcised]]. For each of the practices examined, lifetime experience of various forms of oral and anal sex and [[masturbation]] frequency in the past year, [[circumcised]] men engaged in these behaviors at greater rates. The difference between [[circumcised]] men was greatest for [[masturbation]] — ironically, a practice that [[circumcision]] was once thought to limit. A total of 47% of circumcised men reported masturbating at least once a month vs 34% for their [[uncircumcised]] peers."<ref name="laumann1997>{{REFjournal | Laumann et al. (1997) reported that men who lack a foreskin "engage in a somewhat more elaborated set of sexual practices than do men who are not [[circumcised]]. For each of the practices examined, lifetime experience of various forms of oral and anal sex and [[masturbation]] frequency in the past year, [[circumcised]] men engaged in these behaviors at greater rates. The difference between [[circumcised]] men was greatest for [[masturbation]] — ironically, a practice that [[circumcision]] was once thought to limit. A total of 47% of circumcised men reported masturbating at least once a month vs 34% for their [[uncircumcised]] peers."<ref name="laumann1997>{{REFjournal | ||
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* [[Circumcision - Penis SensitivityTest]] | * [[Circumcision - Penis SensitivityTest]] | ||
* [[Erogenous sensation of the foreskin]] | * [[Erogenous sensation of the foreskin]] | ||
* [[Foreskin comment]] | |||
* [[Foreskin in Motion]] | * [[Foreskin in Motion]] | ||
* [[Frenulum]] | * [[Frenulum]] | ||
* [[Fusions and adhesions]] | |||
* [[Gliding action]] | * [[Gliding action]] | ||
* [[Immunological and protective function of the foreskin]] | * [[Immunological and protective function of the foreskin]] | ||
* [[Jojoba]] | |||
* [[Living with a foreskin in circumcised America]] | * [[Living with a foreskin in circumcised America]] | ||
* [[Long foreskins]] | |||
* [[Longer foreskin is favored]] | * [[Longer foreskin is favored]] | ||
* [[Pre-ejaculate]] | * [[Pre-ejaculate]] | ||
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|date=2022-06-12 | |date=2022-06-12 | ||
|accessdate=2024-10-05 | |accessdate=2024-10-05 | ||
}} | |||
* {{REFweb | |||
|url=http://www.savingsons.org/2015/09/foreskin-and-its-16-functions-not-just.html | |||
|title=Foreskin and its 16+ Functions: Not 'Just Skin' | |||
|last=Anonymous | |||
|publisher=Saving Our Sons | |||
|date= | |||
|accessdate=2025-11-30 | |||
}} | }} | ||
* {{REFweb | * {{REFweb | ||
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|date=2025-07-03 | |date=2025-07-03 | ||
|accessdate=2025-09-06 | |accessdate=2025-09-06 | ||
}} | |||
* {{REFweb | |||
|url=https://my.clevelandclinic.org/health/body/23175-foreskin | |||
|title=Foreskin | |||
|last=Anonymous | |||
|publisher=Cleveland Clinic | |||
|date=2025-08-04 | |||
|accessdate=2026-04-27 | |||
}} | }} | ||
* {{REFweb | * {{REFweb | ||
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|accessdate=2025-11-03 | |accessdate=2025-11-03 | ||
}} | }} | ||
* {{REFweb | |||
|url=https://www.reddit.com/r/uncircumcised_talk/comments/1pmkb1x/foreskins_role_in_masturbating/ | |||
|title=Foreskin’s role in masturbating. | |||
|last=Anonymous | |||
|publisher=REDDIT | |||
|date=2025-12-14 | |||
|accessdate=2025-12-14 | |||
}} | |||
* {{REFweb | |||
|url=https://www.reddit.com/r/uncircumcised_talk/comments/1pwvms4/whats_something_about_foreskin_that_more_people/ | |||
|title=What's something about foreskin that more people should know? | |||
|last=Anonymous | |||
|publisher=REDDIT | |||
|date=2005-12-27 | |||
|accessdate=2025-12-29 | |||
}} | |||
* {{REFweb | |||
|url=https://www.foreskin.day/factsandfallacies.html | |||
|title=Foreskin Facts and Phallacies | |||
|last=Anonymous | |||
|first= | |||
|init= | |||
|author-link= | |||
|publisher=Intact America | |||
|date=2026-04-04 | |||
|accessdate=2026-04-04 | |||
}} | |||
{{REF}} | |||
[[Category:Education]] | |||
[[Category:Foreskin anatomy]] | [[Category:Foreskin anatomy]] | ||
[[Category:Foreskinned life]] | [[Category:Foreskinned life]] | ||
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[[Category:Physiology]] | [[Category:Physiology]] | ||
[[Category:Male sexuality]] | [[Category:Male sexuality]] | ||
[[Category: | |||
[[Category:Teen]] | |||
[[Category:From Intactipedia]] | [[Category:From Intactipedia]] | ||
[[de:Vorhaut]] | [[de:Vorhaut]] | ||