A NSFW and very honest OMGYES review from a woman who tried it.
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The Best Orgasm Techniques to Try from OMGYes
Not a one-size-fits all 'G spot map' made by a straight man for other straight men, but a library of techniques used by women that might work for you.
Hinting involves building anticipation by repeatedly approaching sensitive areas but only occasionally indulging them with attention, often used as a foreplay technique.