Well it sounds to me like its clitoral stimulation that does it as a necessity for ya. I used to grind on my girlfriend, and i guess she would really enjoy it, and now she can actually have an orgasm from grinding on me. She actually gets more pleasure from a spot close to the clitoris but not exactly. So you guys should try oral, and maybe have him rub his fingers on your clitoris. Or maybe you also enjoy being dominant? But i think its more about the right stimulation on the clit, thats my hypothesis.
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