Given that there are probably thousands of women who would raise their hands and go "uhm, I must be the exception to your rule then", I heavily doubt it's just our imaginations.

If their method was seriously only asking between twins too, that's the most ridiculous sounding method of discovering a physical attribute I've ever heard of.

To Identical Twin 1: Would you call your hair...blonde?
Twin 1: Oh goodness no!! Much more of a Light Brown!!
To Identical Twin 2: Would you call your hair blonde?
Twin 2: Of course! It may be dark but it has characteristic golden tones!!
Scientists Conclusion: They're disagreeing, so it must be all in their heads and blonde hair does not in fact exist.

Obviously an exaggerated example, but point made. It's a good thing they didn't discover things like Livers and Kidneys just by doing questionnaires.


Not to mention there have been plenty of anatomical studies to support the variable existence of a "G-Spot". Something doesn't have to exist 100% of the time to be a valid anatomical attribute, you know. Lymph Nodes, for example, can be highly variable outside of the few major ones.