Examples of women that have made vagina jokes:

Amy Poehler: "I don't consider myself beautiful or famous, but my vagina certainly is. Everyone knows this. I have the Angelina Jolie of vaginas."

source: http://www.eonline.com/news/591717/amy-poehler-has-the-angelina-jolie-of-vaginas-8-hilarious-quotes-from-her-book-yes-please

Tina Fey: "And now, like a supermodel's vagina, let's all give a warm welcome to Leonardo DiCaprio."

source; http://www.eonline.com/news/498531/tina-fey-s-supermodel-vagina-joke-was-the-best-leonardo-dicaprio-gives-it-thumbs-up-of-approval

Kristen Wigg: ‘A lot of people ask if we were trying to make certain statements and show that women could act like men and it’s so funny, because I don’t see Bridesmaids in that way at all. I’m almost like: “There were vagina jokes?” We just wrote stuff that made us laugh and, to me, it’s just a comedy about friendship and stuff – there are lots of things in it besides the puking and the pooing in the street.'

source: http://metro.co.uk/2013/06/27/kristen-wiig-reading-the-anchorman-2-script-made-me-so-happy-3857966/

There are plenty more. Writing all that, there are a lot of male comedians that talk about their dicks, so it is pretty even in my opinion.