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潮吹:失禁還是「女性射精」?

2015/1/12 — 11:01

晨讀《新科學人》,解答了一個宅男長期疑惑。

「潮吹」現象,連活地阿倫的 Everything You Always Wanted to Know about Sex* (*But Were Afraid to Ask) 也沒有提及,不在電影的七個「你一直想知而不敢問的性問題」之內,筆者以為只是城市迷思

一群性學研究員在平安夜發表《女性性行為中「射液」的性質及來源》研究報告。據《性醫學雜誌》的簡介(註),五位法國 Parly II 私家醫院的婦科醫生找來七位自稱在性高潮時經常排出大量(約一水杯)液體的女性志願者進行實驗。

廣告

研究員首先要求志願者徹底排出體內尿液,然後通過沒有詳細說明過程的方法達到高潮。七位志願者均能順利產生「潮吹」現象,並由研究員收集「潮液」。團隊分析過前後兩批液體之後,證實化學成份全部相同,其中五位志願者的潮液則多了一種由類似男性前列腺的 Skene Gland 沁入尿道,稱為 PSA 的酶素。

因此,女性高潮時所排出的液體為尿液。

廣告

學者 Beverley Whippe 認為,只有真正由 Skene Gland 排出,含有 PSA 的白色液體才是女性性高潮排洩物,因此只有含 Skene Gland 液體的潮吹才是真正的「女性射精」,至於純綷排出尿液的潮吹,研究員稱為 involuntary emission of urine ,尿失禁。

宅男仍有疑問。一:為何性興奮會令排空了的膀胱迅速充滿?二:男性生殖器官勃起時不能同時排尿,所以男性不能潮吹。女性潮吹亦不是普遍現象,是否因尿道被興奮狀態的性器壓迫,令尿液不容易通過?

註:為免 lost in translation,附原文:

Abstract

Introduction
During sexual stimulation, some women report the discharge of a noticeable amount of fluid from the urethra, a phenomenon also called “squirting.” To date, both the nature and the origin of squirting remain controversial. In this investigation, we not only analyzed the biochemical nature of the emitted fluid, but also explored the presence of any pelvic liquid collection that could result from sexual arousal and explain a massive fluid emission.

Methods
Seven women, without gynecologic abnormalities and who reported recurrent and massive fluid emission during sexual stimulation, underwent provoked sexual arousal. Pelvic ultrasound scans were performed after voluntary urination (US1), and during sexual stimulation just before (US2) and after (US3) squirting. Urea, creatinine, uric acid, and prostatic-specific antigen (PSA) concentrations were assessed in urinary samples before sexual stimulation (BSU) and after squirting (ASU), and squirting sample itself (S).

Results
In all participants, US1 confirmed thorough bladder emptiness. After a variable time of sexual excitation, US2 (just before squirting) showed noticeable bladder filling, and US3 (just after squirting) demonstrated that the bladder had been emptied again. Biochemical analysis of BSU, S, and ASU showed comparable urea, creatinine, and uric acid.

Salama, S., Boitrelle, F., Gauquelin, A. & et al. (2014). Nature and Origin of “Squirting” in Female Sexuality. The Journal of Sexual Medicine, Article first published online: 24 DEC 2014. DOI: 10.1111/jsm.12799

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