The experiment begins with the explanation, "Please do not to hold back your voice, urination, orgasm to get accurate results."Eventually, the vagina becomes a sensation that is almost numbness and numbness and loses the feeling of stopping urination...A record of a 6 individual fixed vibrators (through clothed, direct contact with genitals, irregular positions, direct contact with genitals), including two researchers from SOD sex science lab, and six of them were tested simultaneously.
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