Hmmm, I seem to be a bit alone saying that I´m not very much in licking. Did it sometimes, but never really could stand that metallic taste. The smell was sometimes very intensive, and not attractive on every girl. Depends. (Some others´ smell is a big turn-on.)
That does not mean I do not want it. My new g/f´s pussy does not smell at all, and that gives me hope that I will really like licking her out.
About the food: I do not know, but perhaps consuming garlic or too much meat might influence the taste.
There is one thing that really makes it easier for me: if she is shaved! Yes! Licking pubic hair is... ummm... I don´t like it.

But: DON´T WORRY, IF HE LIKES IT IT´S OK!.

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If every material thing is gone, my smile and my tears stay left.