Blogger Neuroskeptic has this book review in the New Statesman on Naomi Wolf's autobiography of her vagina.  Here's an except:

Threats, admiration and reassurances all influence our stress levels, and stress can affect the function of the vagina. But the same could be said for any other organ: stress also affects the heart, the stomach, and even the penis. 

What's more, the study Wolf linked to in support of her idea that "a stressful environment can negatively affect vaginal tissue itself" was in rats.