Vagina Science

Via Ritholtz, Jenny Morber gets into the details of female anatomy.  This part was pretty crazy:

In 1991 a group of three researchers published a paper that described a method for casting a mold of the vagina using material more commonly used to make dental impressions. In short, liquid polymer goo is injected into a willing woman’s vagina with a kind of caulk gun. She waits ten minutes. Then with the help of KY, squatting and pushing, and the string from a tampon that was inserted before the material dried, the mold is removed. Though this paper included only two participants, a few years later the same researchers (plus a couple of others) published another study that examined vaginal molds of 39 women. In these women, all Caucasian, vaginal lengths ranged from almost 7 to almost 15 centimeters (2.75–6 in) with diameters between 2.4 and 6.5 cm (~1–2.5 in). A later study classified the diversity of vaginal shapes: conical, parallel sides, heart, slug, and pumpkin seed. (I can’t be the only one hoping that my vagina looks like a pumpkin seed instead of a slug.)
And if you are thinking that maybe you really ARE above average because you have evidence that a seven inch penis can fit in yours, please remember that these studies are performed on women who are not sexually aroused. The vaginal wall lengthens during arousal as increased blood flow pushes the cervix and uterus upward. How do we know this? Well, MRI sex videos help (NSFW).

That sounds like some folks who are really interested in advancing the scientific knowledge of society.  Otherwise, I can't figure out why anybody would go through all that. There's a lot more information in the article.