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基本上，只有六種體位，其他的都只是這些主旋律的變化：男上、女上、側邊、後進、站立、坐跪。
知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。
知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。
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The NSFW tag serves like a precious Resource in sustaining professionalism and private boundaries within the electronic Place. By labeling material as NSFW, creators and customers enable:
知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。
▼口愛時投入的表情很重要，能幫助另一半更快進入狀況。（示意圖／記者周宸亘攝）
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以生物觀點來看，男人一定要達到高潮才能讓人類種族延續，但女人卻不一定要達到高潮才能受精。但已有研究報告說女人如果在性交的時候高潮，可以提高受精的機會。很顯然，在高潮時候子宮頸會規律地把射在陰道末端的精液給吸入。在歷史的某些時代，性高潮被認為是女性受精所必須的。也許我們的祖先和大自然懂得比我們所想的還多！
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