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24Drs好健康報:咖啡因對女性有催情作用？

好健康熱頭條 ─  Caffeine: Sex Potion for Females? 
好健康小單字─ 性功能障礙(sexual dysfunction) 
  好健康熱頭條 ─ 
 
 
最新研究顯示，咖啡因對女性有催情作用。

在這項研究中，相較於未施打咖啡因的雌鼠，在交配前被施打一劑咖啡因的雌鼠，會在性交後又迫不及待地想回到雄鼠身邊。

施打咖啡因的雌鼠不像是只想要找個伴。研究員Fay Guarraci博士向WebMD表示，看來，她們是要再次性交。

咖啡因是否也會增進女性的性生活？德州喬治城西南大學心理學助教Guarraci博士表示，可能會，但還言之過早。

這項研究標題為「咖啡、茶和我」，預計發表於《藥理學、生物化學和行為》期刊中。

【攝取咖啡因變得性飢渴？】
Guarraci博士並不建議女性把咖啡因當作春藥，至少還不到時候。

Guarraci指出，在性愛前直接施打咖啡因，或是喝咖啡來提高性能力或性慾的假設不全然正確，我們僅施打一劑的咖啡因在實驗鼠身上，且牠們從未接觸過咖啡因。

她觀察到，大部份的時候是女性每天喝咖啡的量，或是喝可樂飲料所攝取的咖啡因。

有趣的是，假設一般的咖啡因用量對雌鼠有相同的效果，假設推論正確，她表示，在發表它對女性有益考量的說法上更具信心。

然而，她也補充，目前研究的結果「可能值得那些沒攝取那麼多咖啡因的女性考慮採用（通常飲食中攝取低量的咖啡因）。

【雌鼠回頭需索更多的性】
接受咖啡因施打的雌鼠不那麼的害羞了。

Guarraci博士解釋，我們測量它們性慾的標準，是牠們剛性交過後立即回頭找雄鼠的狀況。

對雌鼠而言是正常的行為；在這項研究中，速度和動機是影響因素。

Guarraci博士表示，接受咖啡因施打的雌鼠「會迅速地去找雌鼠，牠們會待在雄鼠身邊，直至牠們受到性剌激才離開。

Guarraci博士表示，似乎不只是雌鼠想要在雄鼠身邊，而是特別和性交有關，牠們會接收到剌激。

但研究顯示，咖啡因並未對雌鼠在性交後離開伴侶的速度有多快造成影響。

【大杯拿鐵的咖啡因量】
研究員對實驗鼠進行數種咖啡因劑量的測試，劑量是以老鼠的重量為基準；有趣的是，相對於施打高劑量咖啡因的雌鼠，施打中劑量咖啡因的雌鼠，反而較快回到雄鼠的身邊。

以等比例咖啡因的量運用在人類身上，最低的劑量大約和「星巴克大杯拿鐵（高咖啡因量飲品）」中的咖啡因量相等，但效果並無驚人之處。

她表示，最高的咖啡因劑量是一次喝數杯大拿鐵；實驗鼠被咖啡因搞得春心蕩漾嗎？答案是沒有。
Guarraci博士在接受咖啡因施打雌鼠的研究中發現，牠們不只是漫無目的繞著籠子打轉，而是特別想要找雄鼠性伴侶，且不會想和其牠雌鼠有任何的互動。

接受咖啡因施打的雌鼠似乎是被咖啡因驅動著去尋找性，而不想浪費精力在其他事物上。

【你的性行為像實驗鼠嗎？】
人鼠之間確有極大差異，但鼠的精心求愛行為則和某些人相似。

Guarraci博士指出，雌鼠似乎主導著豔遇的發生，因此當雄鼠和雌鼠準備好要性交，雌鼠則為雄鼠把其他的干擾因素排除；由雌鼠來決定雄鼠何時可以接近牠，這種狀況在實驗室內外皆相同。

她進一步指出，當雌鼠有興致時，她會去找雄鼠，但當雌鼠對雄鼠提不起興致或想要休息，雌鼠則會跑開；對我來說，那有點像是在玩欲擒故縱的遊戲。

最後，Guarraci研究團隊想要識別出哺乳類動物中性慾的化學反應及大腦結構，包括人及鼠。

Guarraci博士表示，有許多女性罹患性功能障礙，若是她們瞭解那是怎麼發生的，或是醫師知道該怎麼幫助她們，將會是女性福音。
  
  
  
  Caffeine: Sex Potion for Females? 
 
 
Caffeine may put females in the mood for sex, a new study shows.
In the study, female rats that got their first shot of caffeine before mating were quicker than uncaffeinated females to scurry back to a male rat after sex.
The caffeinated females weren't just looking for company. "It looks as if they wanted to have sex again," researcher Fay Guarraci, PhD, tells WebMD.
Might caffeine also rev up women's sex lives? Maybe, but it's too early to say, says Guarraci, an assistant professor of psychology at Southwestern University in Georgetown, Texas.
The study, titled "Coffee, Tea, and Me," is due to appear in an upcoming issue of Pharmacology, Biochemistry, and Behavior.
Consume Caffeine, Crave Sex?
Guarraci isn't advising women to use caffeine as an aphrodisiac -- at least, not yet.
"My caution in terms of directly applying the caffeine or the coffee before sex to enhance your sexual drive or motivation would be that in this experiment, we gave only one dose of caffeine to animals who had never had caffeine before," Guarraci says.
"Most of the time, women drink coffee on a daily basis or ingest caffeine in cola beverages," she observes.
It would be interesting to see if regular caffeine use had the same effect on female rats, Guarraci says. If she knew that to be true, she would "be more confident in saying that it would be something useful for women to consider," she says.
Still, she notes the current study's results "might be something to think about for women who don't ingest a lot of caffeine, who usually have a low level of caffeine in their diet."
Female Rats Returned for More Sex
The caffeinated female rats weren't exactly shy.
"The way we measure their interest is they go back and revisit the male after they've just had some sexual interaction with them," Guarraci explains.
That's a normal behavior for female rats. In this study, speed and motivation mattered.
The caffeinated females "would go and visit faster, and they would stay with the males until they received sexual stimulation before they left," Guarraci says.
"It wasn't just that they wanted to be around them. It seemed to be particularly relevant to the sexual interaction, the stimulation they would receive," Guarraci says.
Caffeine didn't affect how quickly the female rats left their partners after sex, the study shows.
A Large Latte's Dose of Caffeine
The researchers tested several caffeine doses on the rats. The doses were based on the rats' weight. Interestingly, the female rats that received the middle dose of caffeine had quicker return visits to the males than the highest dose tested.
Using the same formula for humans, the lowest dose would roughly equal the caffeine in "a grande latte at Starbucks ... a pretty high-caffeinated beverage, but not something outrageous," Guarraci says.
The higher doses were like having several large lattes at once, she says. Were the rats totally wired by the caffeine? "No," Guarraci says.
Her study shows that the caffeinated females didn't just skitter around their cages aimlessly. Instead, they specifically sought a male sex partner and weren't particularly interested in socializing with another female rat.
The caffeinated females seemed motivated to seek sex, not to burn extra energy from the caffeine, the researchers write.
Do You Mate Like a Rat?
Rats and humans are obviously different. But rats' elaborate courtship behavior may sound familiar to some people.
"The female seems to control the mating encounter," Guarraci says of rats.
"So when a male and a female rat are ready to mate, the female does all the gatekeeping for the male. She decides when it's time for him to mate, in the wild as well as in the lab," Guarraci says.
"The female, when she's interested, she'll go visit a male. But then when she's not interested in him anymore or wants to take a break, she runs away. To me, it seems a little bit like the playing hard-to-get with the male rats," she continues.
Ultimately, Guarraci and colleagues want to identify the chemistry and brain structures involved in sexual motivation for mammals, which include people, as well as rats.
"There are a lot of women out there with sexual dysfunction, and if they understood how that happens or how we can augment that, that would be a helpful thing," Guarraci says.
SOURCES: Guarraci, F. Pharmacology, Biochemistry and Behavior. Fay Guarraci, PhD, assistant professor of psychology, Southwestern University, Georgetown, Texas. News release, Southwestern University.
WebMD Medical News
by Miranda Hitti
Reviewed By Louise Chang
  
  
  
  好健康小單字─ 性功能障礙(sexual dysfunction)
 
 
「性功能障礙」是指一個人有慾求，卻無法完全地享受性活動；其成因很多，包括對性行為的害怕、緊張及焦慮；與伴侶溝通發生問題，對伴侶懷有敵意或憤怒；過份強調控制而缺乏身體及情緒上的親密，對性及性活動持負面情緒；成長時受到社會及家庭對性所持的價值觀影響；此外，創傷經驗、貧乏及不正確的性知識，也可能導致性功能障礙的發生。
  
  
  
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