I hope the BBC is hugely simplifying the methodology of this study, because otherwise I can't see that it makes any sense. If woman A reports that she has a G-spot and woman B (her identical twin) reports that she does not then possible reasons include:
– Neither woman A nor woman B has a G-spot in any physical sense (woman A is reporting a purely psychological phenomenon, which the study appears to equate with the G-spot not existing)
– Both woman A and woman B have a G-spot but woman B has not found hers
– woman A reads Cosmopolitan and woman B does not
And we would still need to be entirely clear that as long as sex is not making either of them miserable it doesn't matter a damn, and the key thing that makes sex miserable for people is the feeling that they aren't doing it "properly", and the key thing that makes them feel they aren't doing it properly is endless "must-do" advice, like "Finding The G-spot: 200 Reasons Why You Aren't Doing It Properly If You Haven't". 🙂