But using the filler to pump up the G spot is a much newer indication. And a study that documents the safety and efficacy of the procedure has yet to appear in a peer-reviewed medical journal.
Still, there are many women who are willing to give it a try. And since the G shot is a lunchtime procedure, with women entering the doctors' office and leaving 15 minutes later, women can get it done quickly and discreetly. Adding to the discreet nature of the procedure, recovery time from the procedure is on the scale of hours according to the G-shot Web site.
Greene recalled that her experience was not an unpleasant one. "The only thing I felt was the needle with the anesthetic going in, and I felt a tiny pinch. I've had gynecological exams that were much more uncomfortable."
And while she says she recalls seeing the laundry list of potential risks, when asked Greene could name one of them.
But therein may lie the danger. Bass said she worries that the group atmosphere of a G-shot party could cause women to ignore the potential risks of the procedure.
"Whenever you insert anything into the body without knowing what the risks or the long-term consequences are, you're putting yourself in danger," she said.
But Matlock said just because the procedure is being offered at a party does not make it any more dangerous. And he added that the guidelines of the party are tightly controlled in order to maintain a professional treatment atmosphere.
"In a Botox party, you're doing it at a home. The attendees drink alcohol and so on," he said. "The G-shot party is done in the doctor's office, with a group of women, and giving them education on the procedure together."
"There is no alcohol, no wine, no cocktails," Matlock said, adding that liquid refreshment is limited to coffee and soft drinks.
Not all sexuality experts said such parties were an altogether bad idea. Judy Kuriansky, sex therapist and author of "The Complete Idiot's Guide to Tantric Sex," said there are pros and cons to the "parties" to discuss the procedure.
"This is like an outgrowth of the early consciousness-raising groups that women had 30 years ago," she said, citing that such gatherings had the positive effect of teaching women about their own sexual arousal and responses.
But she said she fears the popularity of the procedure is a product of an almost competitive view of sexuality, in which women are pressured to perform.
"This is ripe for exploitation and even more pressure on women," she said.
Donnica Moore, an obstetrician/gynecologist and president of the Sapphire Women's Health Group, suggested a party of a different kind might be more productive.
"How about we have a party that invites male partners to come and be instructed on where the location of the G spot is?" she said. "While we're at it, we can also show them how to locate the clitoris.
"Female sexual satisfaction is based a lot more on what's going on in the relationship than what's going on in or around the G spot."
Greene said she does not yet know whether she will opt for a top-up procedure in the coming months. Part of her decision may be based on the costs; a single shot of the filler used in the procedure costs $1,850, while a double shot — which Greene opted for — runs $2,500.