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插入子宫口的性爱技巧

　　男方的阳具插入女方的阴道到子宫口会是什么感觉？子宫颈的内腔为宫颈管，子宫颈管下口称子宫口，通阴道，口的前、后缘分别有前、后唇。未产妇的子宫口呈圆形，边缘光滑整齐，分娩后的子宫口为横裂状。但很多人还不知道，如果阴茎足够长的话，可以顶到女方...[查看全文]

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