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男性のオルガズムと射精の仕組み 勃起が副交感神経を介しているのに対し、射精は交感神経に制御されています。 性的興奮による刺激が、脳から交感神経を介して男性の生殖器に伝わる。

射精までの3つのプロセス. 射精は次の3つのプロセスを経て起こります。 1）Emission： 精子、精嚢の分泌液、前立腺液が前立腺内へ送られる. ↓. 2）膀胱頸部の閉鎖： 膀胱側に精液が逆。

【「性知識イミダス：男性の生殖器を知ろう」もあわせてご覧ください】 「射精のしくみなんて知らなくても、男なら自然とできることだろう」――そんなふうに思っている人はいないだ。

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