[認真] 一開始就知道要插哪邊嗎已回收
很好奇動物(包括人類)一開始交配時就知道要用雞雞插進陰道嗎
還是一開始可能是插其他部位(嘴巴？鼻孔？肛門)，然後慢慢演變成插陰道這樣？
不要跟我說是什麼動物以生俱來的本能，總會有最初的開端吧
就像你第一次尻槍之前一定有先經過學習or別人教過才知道怎麼打吧
但話說回來，十幾萬年前哪來的A片可以看著學
會不會是外星人教的？
請大家集思廣益討論一下
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