Shin Girma yana da mahimmanci ga Mata?

Mahimmancin juyin halittar girman azzakari ya kasance jigon hasashe mai yawa, galibi an haɗa shi da tatsuniya cewa phallus ɗan adam ya fi girma fiye da sauran dabbobin daji. Koyaya, azzakarin ɗan adam ya ɗan ɗan gajarta, ko da yake yana da faɗi da yawa, fiye da na bonobos da chimpanzees na yau da kullun. (Dubi sakona na Janairu 3, 2015 Girman azzakari yana da mahimmanci da mabiyi Fadada akan Girman azzakari na Fabrairu 4.) Abin mamaki - duk da bukatar da babu tantama a yi la’akari da “alherin dacewa” (tare da neman afuwa ga masu ilimin kididdiga) - da kyar aka ambaci tsawon da faɗin farji.

Girman farjin mutum

A cikin tattaunawar da ba kasafai ake yi ba game da girman mata, a cikin 2005 Jillian Lloyd da abokan aiki sun ba da rahoton matsakaicin tsawon farji na kasa da inci huɗu ga mata 50, tare da matsanancin inci biyu da rabi da inci biyar. Abu mai mahimmanci, tsawon farji bai bambanta tsakanin matan da aka haife su da waɗanda ba su da su. Don haka tsarin haihuwar ɗan adam na ƙalubale da alama baya haifar da ɗimbin farji. Amma duk da haka David Veale da abokan aikinsa sun ba da rahoto a cikin wani binciken da aka yi kwanan nan wanda ya shafi wasu maza 15,000 cewa matsakaicin tsawon azzakarin namiji na tsaye shine kusan inci biyar da kwata. Wannan yana da ƙarancin ƙasa fiye da yadda aka ruwaito a baya, amma koda a wannan girman, matsakaicin azzakarin azzakari shine na uku fiye da matsakaicin farji. Don haka ba abin mamaki bane cewa mata sun fi kula da tsawon azzakari fiye da shagaltar da maza da haƙƙin alfahari.

Kwatantawa da dabbobin da ba ɗan adam ba

Kamar yadda aka saba, kwatancen tare da dabbobin da ba na ɗan adam ba suna sanya bayanan ɗan adam cikin hangen nesa. Littafin Alan Dixson Babban Jima'i ya sake zama babban tushe, yana lissafin tsayin farji ga mutane da sauran nau'ikan halittu 27. Inci huɗu da rabi da aka ambata don tsawon farjin ɗan adam (daga Bancroft, 1989) ya kusan 10% mafi girma fiye da yadda Jillian Lloyd da abokan aiki suka ruwaito, amma har yanzu yana ƙasa da tsawon matsakaicin azzakarin da ke tsaye. Yin mãkirci akan nauyin jikin mace, ta amfani da bayanan Dixson, yana nuna cewa tsawon farji yana auna nauyi na jiki tare da daidaituwa mai sauƙi. Duk da warwatsewa, bayyananniyar hanya ta bayyana kuma matsakaicin tsawon farji ga mata a zahiri yana kusa da mafi kyawun layi. Don haka mata ba su da dogon farji musamman idan aka kwatanta da sauran dabbobin. Abin ban mamaki, duk da haka, a ɗan sama da inci biyar, farjin chimpanzees na mata ya fi na mata tsayi sosai. Haka kuma, a tsakiyar tsakiyar haila, fatar jinsi a yankin al'aurar mace chimpanzees ya kumbura, yana tsawaita tasirin farji da kusan inci biyu.

Abin baƙin cikin shine, bayanai kan faɗin farji don masu farauta gabaɗaya sun rasa, don haka ba a sani ba ko farjin mace yana da faɗi fiye da na sauran dabbobin.

Gyaran ɗan adam

Anatomically, mace ta kai tsaye takwaransa (homologue) na azzakarin namiji shine gindinta. Koyaya, ya bambanta daban saboda azzakari yana da rawar biyu don fitsari da haɓuwa. Sabanin haka, gindin mace yana da nasaba ne kawai da kwaɗayi kuma baya ma shiga cikin hadi. Tsotsar gindi ita ce yankin da ya fi shahara a cikin mata kuma babban tushen jin daɗin jima'i. Kuma ya keɓe daga mafitsara, wanda buɗe (urethra) ya fi inci ɗaya nesa.

Duk da keɓaɓɓiyar hanyar haɗin gwiwar da ke tattare da kwaɗayi, masu binciken sun yi banza da abin da bai dace ba. A cikin takardarsu ta 2005, Jillian Lloyd da abokan aiki sun yi sharhi cikin ladabi: "... har ma wasu litattafan rubutun jikin ɗan adam na baya -bayan nan ba su haɗa da gindi a kan zane -zanen ƙashin ƙugu ba." Waɗannan marubutan sun ba da matsakaicin kashi huɗu cikin huɗu na inci don tsayin tsintsiya ta waje. Amma akwai banbanci mai yawa sama da girman ninki takwas daga kashi daya cikin biyar na inci zuwa inci daya da rabi. Duk da ƙaramin girmansa, abin da ake kira "maɓallin ƙauna" yana ƙunshe da wasu ƙwayoyin jijiyoyin jijiya 8,000, ninki biyu a cikin kumburin azzakari kuma ya zarce yawa a ko'ina cikin jiki.

Takardun kwanan nan guda biyu da aka buga a 1998 da 2005 na Helen O'Connell da abokan aiki sun haɓaka fahimtar ilimin jikin ɗan adam. Na farko, dangane da rarrabuwar kawuna 10, ya bayyana cewa ɗanɗano da ake iya gani a waje (glans) ƙaramin sashi ne na “hadaddiyar gandun daji” wanda ya fi yawa fiye da yadda aka sani a baya. Lallai, shafin yanar gizo na 2012 da Robbie Gonzalez ya kwatanta kwatankwacin kwatankwacin da dusar ƙanƙara mafi yawan gani. Takardar ta biyu ta O'Connell da abokan aiki sun yi amfani da hoton hoton maganadisu don yin nazari kan kyakkyawan tsarin tsarin tsarkin. A kowane gefe, ɓoyayyen ɓangaren hadaddun yana ƙunshe da kwan fitila da jikin soso (corpus cavernosum) wanda ke miƙawa zuwa hannun tapering (crus). Jiki da hannu tare suna da tsawon inci huɗu, sun fi tsayi fiye da kallon waje. Hadaddiyar gidan da ke ɓoye tana tsaye, alhali wannan yana iya zama ba gaskiya ba ne a zahiri, kodayake yana daɗaɗawa yayin motsawar jima'i. Kwararan fitila da jikinsu suna gefen gefen farji kuma suna kumbura lokacin tsaye, matse shi.

A shekara ta 2010, Odile Buisson yayi amfani da na’urar duban dan tayi don bincikar rawar dabbar yayin da likitoci biyu masu aikin sa kai suka yi jima’i. Hotunan sun nuna cewa hauhawar farji ta azzakari ya shimfiɗa tushen gindi, ta yadda yana da alaƙa ta kusa da bangon gaban farji, wanda aka sani da G-spot. Marubutan sun kammala daga bincikensu: "Dole ne a ga farji da farji a matsayin wani ɓangaren jikin mutum da aikin da ke shiga ta cikin farji yayin saduwa."

Ƙarfin aiki?

A cikin kalmomin Stephen Jay Gould (1993), "Kamar yadda mata suka sani tun farkon wayewar zamaninmu, babban wurin don motsawa zuwa cibiyoyin inzali a kan gindi." Kuma inzali na mace gaba ɗaya shine babban mahallin don tattaunawa akan mahimmancin farji. (Dubi post na na Yuni 5, 2014 Orgasms na mata: Farawa ko Ci gaba? ). Bayanin da aka gabatar da yawa sun tafasa zuwa ainihin tambayar ko an yi amfani da guntun tsawa da gabobin da ke haɗe don wani aiki na musamman ko samfuran samfuran kawai. Tare da Gould, Elisabeth Lloyd da ƙarfi ta ba da shawarar ra'ayi cewa ƙusar mace, kamar nonon namiji, kawai ɗaukar aiki ne daga hanyoyin raya farkon farkon. Babbar gardamar da ke karfafa wannan fassarar ita ce, duka abubuwan da ke faruwa na inzali na mata da girman gindin mata na waje suna da sauyi wanda da alama ba a tace su ta zaɓin yanayi.

A cikin takarda ta 2008, Kim Wallen da Elisabeth Lloyd sun ba da rahoton cewa canji a cikin tsotson tsintsiya ya ninka na farji ko tsawon azzakari. Koyaya, a cikin sharhin da suka biyo baya, David Hosken da Vincent Lynch sun lura da aibi guda biyu a cikin hujjarsu. Na farko, Hosken ya nanata cewa bambance -bambancen da ke cikin girman gindin ba zai iya gaya mana komai game da inzali na mata ba. Na biyu, bambancin girman ba, a zahiri, ya bambanta ƙwarai tsakanin gindi da azzakari. A bisa ƙa'ida, ma'aunin canjin da Wallen da Lloyd suka yi amfani da su - mai daidaiton bambancin - yana soke bambance -bambance a cikin matsakaicin girman. Duk da haka, tsawon gindi bai wuce kashi ɗaya bisa shida na tsawon azzakari ba, don haka kuskuren auna yana da tasiri mafi girma. Don ƙalubalantar wannan matsalar, Lynch yayi kwatankwacin sauye -sauye a cikin gutsuttsarin gindi da azzakari kuma bai sami babban bambanci ba. A kowane hali, bai kamata mu yi tsammanin samun sakamako mai ma'ana ba idan muka bincika ƙarshen dusar ƙanƙara maimakon gaba ɗaya!

Buisson, O., Foldes, P., Jannini, E. & Mimoun, S. (2010) Coitus kamar yadda aka bayyana ta duban dan tayi a cikin ma'aurata masu aikin sa kai. Jaridar Magungunan Jima'i 7: 2750-2754.

Di Marino, V. & Lepedi, H. (2014) Nazarin Anatomic na Clitoris da Bulbo-Clitoral Organ. Heidelberg: Springer.

Dixson, AF (2012) Babban Jima'i: Nazarin Kwatancen Prosimians, Birai, Biri da Halittun Dan Adam (Buga na Biyu). Oxford: Jami'ar Jami'ar Oxford.

Gonzalez, R. (2012) Post ɗin blog don io9, wanda aka aika zuwa ilimin jima'i: http://io9.com/5876335/until-2009-the-human-clitoris-was-an-absolute-mystery

Hosken, DA (2008) Bambancin Clitoral bai ce komai ba game da inzali na mata. Juyin Halitta & Ci Gaban 10: 393-395.

Lloyd, DA (2005) Halin Mata Orgasm: Bias a cikin Kimiyyar Juyin Halitta. Cambridge, MA: Jami'ar Jami'ar Harvard.

Lloyd, J., Crouch, NS, Minto, CL, Liao, L.-M. & Creighton, S.M. (2005) Bayyanar al'aurar mace: 'ƙa'ida' ta bayyana. Jaridar British Obstetrics & Gynecology 112: 643-646.

Layin, V.J. (2008) Bambance -bambancen girman kai da azzakari ba su da banbanci sosai: rashin shaida ga ka'idar da ba ta dace ba ta inzali na mata. Juyin Halitta & Ci Gaban 10: 396-397.

Gidan Tarihi na Jima'i blog akan gindin ciki: http://blog.museumofsex.com/the-internal-clitoris/

O'Connell, HE, Hutson, JM, Anderson, CR & Plenter, R.J. (1998) Dangantakar anatomical tsakanin urethra da clitoris. Jaridar Urology 159: 1892-1897.

O'Connell, HE, Sanjeevan, KV & Hutson, JM (2005) Anatomy na ɗanɗano. Jaridar Urology 174: 1189-1195.

Veale, D., Miles, S., Bramley, S., Muir, G. & Hodsoll, J. (2015) Ni al'ada ce? Nazari na tsari da gina nomogram don madaidaiciya da tsayin azzakari da da'irar maza har zuwa 15 521. BJU International doi: 10.1111/bju.13010, 1-9.

Verkauf, B.B., Von Thorn, J. & O'Brien, W.F. (1992) Girman Clitoral a cikin mata na al'ada. Likitan mata & likitan mata 80: 41-44.

Wallen, K. & Lloyd, E.A. (2008) Bambancin Clitoral idan aka kwatanta da bambancin azzakari yana goyan bayan rashin daidaiton inzali na mata. Juyin Halitta & Ci Gaban 10: 1-2.