About 性爱服务
About 性爱服务
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致使用者：请搜索一下条目的标题（来源搜索："性交体位" — 网页、新闻、书籍、学术、图像），以检查网络上是否存在该主题的更多可靠来源（判定指引）。
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【衝撃】広島・小学校で女子児童にわいせつ未遂 教師逮捕 “やさしい…
「文里補習班」開課啦！這次教兩道開胃料理，家中小孩也能一起製作，共創回憶！
出頭の男を殺人未遂容疑で緊急逮捕 池袋のサンシャインシティ切り付け 男性は意識不明
Cultural norms and values considerably influence what is considered "NSFW," as distinct cultures have different 18+（18岁以上） thresholds for explicitness and appropriateness.
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！
The expression "NSFW" features largely being an adjective 一夜情 in daily usage, although it originates from an abbreviation.
這體位也適合性交組合技巧。採取體位A時，注意腳的位置有些變化，讓你的腳固定住她的腳，對性交組合技巧有很大助益。你們的臀部相接，你的恥骨區就可以和她的陰蒂區和外陰區持續接觸，這樣一來就不會打斷彼此的刺激或連結，你也可以深深地進入她體內。她可以緊緊握著你臀部來幫忙。如果男人可以一直保持動作，那這體位很好，可是缺少膝蓋和腳部的支撐，會頗有難度。觀察一下插圖中的腳，她的雙腳距離頗近，約一尺寬，而且腳往外翻，腳趾朝向床緣。有人曾跟我解釋，如果女人的腳和腿採取這樣的姿勢，那男人就可以靠著她收縮的腳來固定住自己。這樣就可以完美地讓性交組合技巧中的緊密骨盆抽插持續著。對需要肌肉張力才能享受高潮的女性來說，這姿勢也很適合。如果男人較高，可以用雙腳靠牆壁或床底豎板來固定住自己。