射精 気持ちいい 理由|性知識イミダス：射精のメカニズムを知ろう～射精は「自然にで。,charliegirll reddit

勃起や射精はなぜ ... たことを教わる機会はほとんどないというのが実情です。射精は単にペニスを刺激すればいいというものではありませんし、大人の男なら誰でもできるというわけでも。

射精が気持ちいい仕組みってどうなってるんですか？ ①精液が出るまではちんこをいじっても気持ちいいけど ... 膣の中に神経は通ってないはずなのになぜ挿入されたとき気持ちいいので。

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。

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