洞房是一個比較特殊的性行為場所定義，他可能同時涉及空間與時間的定義。其通常可以指婚內配偶在婚後的「第一次性行為」，也可以指前述行為發生的那一個「房間」（不過通常不會長久稱之）。完成洞房行為也稱為圓房。
Nancy W. Denney; David Quadagno. Human Sexuality. Mosby-Year E book. 2008: 273. ISBN 0801663741. Although the phrase intercourse is usually accustomed to seek advice from the insertion on the penis into the vagina, It is usually used to confer with oral intercourse or anal intercourse by which the penis is inserted in the mouth or even the anus, respectively.
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ウォーターフロントの家で美しい成熟した女性のポートレート。 - 美女 ストックフォトと画像
.. The prevalent, unquestioned equation of penile–vaginal intercourse with sex displays a failure to look at systematically 'if the respondent's idea of the question matches just what the researcher experienced in mind.'
性行為會因為對象的不同而有進一步的分類，不同社會文化對性行為對象與性行為參與者的態度也常常是該社會中性倫理的決定因子之一。性行為的對象與參與者通常可以其關係、性別與性取向以及參與的人數來進行定義。
Any considered from you is appreciated, useful, and may assist the remainder of the citizens on the planet.
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The recently moved in neighbor was here lonely and unbearable, so she opened the doorway to seduce me, I taught her a lesson with my massive cock 23 min
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進階版：讓他撫摸你的陰蒂，或是你自己撫摸它。身體向後傾斜越多，G 點受到的刺激就越多。