WOMEN orgasm in three different ways, culminating in a rare eruption dubbed the volcano, scientists say.
The most common orgasm was the “wave”, with the woman riding a succession of pleasurable ebbs and flows.
Less frequent was the more powerful “avalanche”, a torrent of larger contractions that gradually ebb away.
Rarest was the “volcano”, the Krakatoa moment famously faked by Meg Ryan in 1989 romcom When Harry Met Sally — a sudden explosive orgasm that can leave onlookers stunned.
Professor James Pfaus, of Charles University in Prague, said the names describe how the “pelvic floor movements appeared during the build-up and the release of tension at orgasm”.
Some 54 women in the study used a Bluetooth-connected vibrator called the Lioness which provides instant orgasmic feedback
Prof Pfaus said the device can help millions of women who struggle to climax.
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He told the Journal of Sexual Medicine: “It is in the hands literally of the client/patient, and does not require constant monitoring by a therapist.
“The feeling of greater personal control often leads people to be able to let go into an orgasm.”