...and succeeds, according to the researcher.

A study by British scientists has found that the mysterious G-spot, the sexual pleasure zone said to be possessed by some women but denied to others, may not exist at all.... In the research, 1,804 British women aged 23-83 answered questionnaires. All were pairs of identical or non-identical twins. Identical twins share all their genes, while non-identical pairs share 50% of theirs. If one identical twin reported having a G-spot, this would make it far more likely that her sister would give the same answer. But no such pattern emerged, suggesting the G-spot is a matter of the woman’s subjective opinion.

While 56% of women overall claimed to have a G-spot, they tended to be younger and more sexually active. Identical twins were no more likely to share the characteristic than non-identical twins. Andrea Burri, who led the research, said she was anxious to remove feelings of “inadequacy or underachievement” that might affect women who feared they lacked a G-spot.

I'm not saying the G-spot exists. I'm not emotionally invested in this debate, as you can well imagine—I don't have a dog in this fight. But I do know that it's possible to carve a groove into yourself, nerve-ending-wise. Some folks have "wired nips," as they say, but many people with sensitive nipples claim that their nipples became sensitive—or became much more sensitive—after playing with them regularly. Could the same dynamic be at work with the G-spot? Have some women with G-spots managed to activate nerve endings that their sisters—even their identical twin sisters—haven't or haven't yet?

Carnal Nation has a good rundown of the researchers who have found some (vague) evidence of the G-spot.