SOME GIRLS OOH.. SOME GIRLS DON'T; MYSTERIES OF THE G-SPOT REVEALED Pleasure area finally located - but only a minority have got it.
SCIENTISTS claim to have found proof the fabled G-spot really exists - but only in some lucky women.
Ultrasound scans found physical differences between nine women who claimed to experience vaginal orgasms and 11 who said they did not.
In the first group, the area of the female body where the G-spot is said to be found - between the vagina and the urethra - was significantly thicker.
The finding ties in with the earlier discovery of biochemical markers relating to heightened sexual response in the same area of the vaginal wall.
Stimulation of the G-spot is said to trigger unusually intense orgasms but opinions are divided on its existence due to a lack of physiological evidence - in contrast to the more obvious clitoris.
The research from Italian expert Dr Emmanuele Jannini suggests not every woman is blessed with a G-spot.
Eventually, he believes, ultrasound could reveal whether women possess one - or if they are more likely to fake vaginal orgasms, like Meg Ryan's character in When Harry Met Sally.
Dr Jannini told New Scientist magazine: "For the first time it is possible to determine by a simple, rapid and inexpensive method if a woman has a G-spot or not."
He added: "Women without any visible evidence of a G-spot cannot have a vaginal orgasm."
In 2002, Dr Jannini's team from the University of L'Aquila found signs of sexual arousal in the area of the G-spot.
They included PDES, an enzyme linked to the chemical that boosts blood flow and triggers male erections.
This time, they used ultrasound to show tissue in the area between the vagina and urethra was thicker in women who had vaginal orgasms.
But questions remain over whether the G-spot is a separate structure or a "hidden" part of the clitoris. Dr Tim Spector, from St Thomas's Hospital, London, said of the findings: "This may be related to the presence of the controversial G-spot.
"However, many other explanations are possible, such as the size of the clitoris, which appears highly variable."
Questionnaire-based studies, such as the Hite report on female sexuality in 1976, suggested 70 per cent of women do not have orgasms through penetrative sex alone, but climax easily as a result of direct clitoral stimulation.
Dr Elisabeth Lloyd, author of The Case Of The Female Orgasm, said: "If Jannini's correlation does hold true, it would help explain the fact that most women do not reliably have orgasm with intercourse."
Dr Jannini is planning further studies on the G-spot, which he believes could even be increased in size by treatment with the male sex hormone testosterone.
It produces responses in both the clitoris and Skene's glands, found in the upper wall of the vagina.
He also reassured women who have never experienced a vaginal orgasm that this is nothing out of the ordinary.
He added: "One clear finding is that each woman is different. This is one reason why women are so interesting."
WHEN SALLY GOT RANDY: Meg Ryan puts body and soul into her famous fake orgasm scene EVERETT COLLECTION/REX FEATURES