Reddit mentions of I'll Show You Mine

Ya zéro chattes pareilles, et en fait "méga ultra moche", "chou-fleur dans la glace" et "malchanceuses" c'est effectivement le terreau le plus fertile pour faire culpabiliser les autres femmes. Gg d'entretenir les complexes, belle sororité c'est ça qu'on aime. Je t'invite à consulter I'll show you Mine – en bibliothèque, c'est gratuit –, histoire de voir d'autres formes et couleurs.

When I was in my 20s (90s), my girlfriend bought a book that was a candid photo essay of various female vulva.

Wikipedia - Femalia

The point of the book was to normalize and show all the different shapes/sizes/colors of the female vulva contrasting what was readily available at the time - which were heavily edited pornography mags and such. My girlfriend affectionately called it her "cunt book". lol I looked for it just now and I cant find it readily available (though it was reprinted in 2011).

Here is another that looks interesting to the same goal:

Ill Show you mine

You might get her something like this to look at in her own time as a kind show of support. (I know - books are antiquated now to many perhaps)

I have no idea your GF's age - but curious. Also, I am not sure how LONG this has been an issue for her. Shy and insecure are "normal" feelings about ones body in many young humans, but this sounds pretty extreme.

I am going to guess though that this will take more than just a change in your behavior, as I am also going to guess the reasoning behind her behavior relates to something she experienced in the past that was traumatic.

I am hoping that she can (if she doesn't already) come to accept that this is something to work to overcome, and not just avoid. I honestly would consider therapy, but of course she would have to be willing. She may be harboring details of what might have led to this that she would be more willing to delve into with a therapist she comes to trust, and start to work through these feelings with such a person. You can only try so much to get her to talk about this and face it head on, and she may be resistant - but don't take it personal, just try to be patient with her, while trying to find a path forward.

I wish you both the best.

I think this might be close to what you're looking for (The Great Wall of Vagina). I did a quick search and couldn't really find a gallery as varied and full as the breast gallery. There were some tiny galleries that showed things like labia minora variance, but there were like, eight pictures.

There's also a really lovely book called I'll Show You Mine (Amazon link here) by Wrenna Robertson.