但是，这个经验并不能停止哥探索的脚步。哥开始拿自己当小白鼠。哥没事玩枪的时候，开始比较细致的区分各种神经刺激的不同感受。按照教科书上的分类，男性生殖器的神经末梢可以分为F区（冠状沟+包皮系带+冠状沟下包皮颜色渐变区）、R区（阴囊中缝）和G点（前列腺）。但实际操 ...
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