人類的性活動牽涉到人的不同層面，包括社会層面、心理層面、生理層面、認知層面、行为以及情感層面；例子包括感情紐帶、情感共享、生殖系統的生理機轉，以及性欲。
出演过主流电影的色情演员列表（英语：Listing of pornographic actors who appeared in mainstream films）
女方抱起自己的膝部捲曲自己，而男方用大腿托起女方，女生的臀部大大的提起，接下來，你懂的！最重要的是男生每下抽動，都可以令女生自動提高，那一種互動感覺一流！
強くて自信があり、リラックスしてカメラを見ている魅力的な成熟した女性。 - 美女 ストックフォトと画像
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手交：以手部與男性陰莖進行的性行為，自體進行的手交是男性自慰最常見的模式。手指與女性外陰進行的非插入式性行為屬於指交的範疇。
性教育ユーチューバー・助産師 シオリーヌさん 大人にこそ知ってほしい「性」のこと
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[男女舒壓成人影片] 捷克按摩工作室台灣女櫃姐初次體驗情趣成人按摩推油，被男技師情色愛撫按摩無套做愛中出小穴
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.. The widespread, unquestioned equation of penile–vaginal intercourse with sex demonstrates a failure to examine systematically 'whether the respondent's idea of the issue matches exactly what the researcher experienced in your mind.'
[男女舒壓成人影片] 日本美女人妻色情按摩店初體驗(中文字幕)～美少婦被男按摩師唬弄卵巢保養用情趣高潮按摩棒刺激小穴揉乳推拿，再用肉棒插入無套做愛深入治療
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