More research is necessary to make more conclusive statements about whether the G-spot has a physiological basis, experts say.
"I don't think that these are invented experiences at all," Herbenick said. "And if at the end of the day, someone's invented something and they feel pleasure from it, then I think that's great."
The G-spot has been so difficult to identify because it is more of a physiological change -- akin to swallowing or urinating -- than an anatomic structure such as a nipple, said Dr. Irwin Goldstein, director of sexual medicine at Alvarado Hospital in San Diego, California, who oversees the peer review process for the Journal of Sexual Medicine.
But a recent study that adds credence to the G-spot concept. French researchers Odile Buisson and Pierre Foldès did ultrasounds of a small number of women having intercourse with men. By looking at the changes in the vagina, the researchers found physiological evidence of the G-spot. This study is under review at the Journal of Sexual Medicine, Goldstein said.
The G-spot is named after Dr. Ernst Grafenberg, a gynecologist known for his research on female genitalia. He described this pleasure zone of the vagina in a 1950 paper.
The 1982 book "The G Spot: And Other Discoveries About Human Sexuality" made the term "G-spot" popular.
A small study by Italian researchers in the Journal of Sexual Medicine in 2008 found that women who were able to achieve vaginal orgasms had thicker tissue between the vagina and the urethra, where the G-spot is said to reside.
A minority of women say they ejaculate when they have a G-spot orgasm. Some sex researchers say this fluid comes from a gland that's near the G-spot area.
Men also have a G-spot of sorts, below the scrotum and above the anus, Goldstein said, although it has not gotten as much attention as the more mysterious female G-spot.
From here:
CNN article: Finding the G-Spot: Is it real?