The cervix is not the end of the vagina!

[Moddingham]

This seems pretty cool although what's this blog?
Can you post a link to that?
Also If you're gonna do diferent sizes I'd recommend the average size. Also include the diamter or girth of the penis as well.
I'm guessing eventually you're aiming toward some sorta 3D model where you can adjust the sizes of everything and stuff to see how it would play out or maybe illustrate why someones having problems with their gf as you can see whats happening inside?

i know this is an old thread but wow the 3d thing sounds cool!

 

[Clamster]

Also do not forget that the cervix is lower when a girls period is due. My wife s cervix is about an inch lower even when she is really aroused so even with my modest 7 inches I have to restrict my thrusing.

 

[bigbenis]

I'm posting a little project I've started and thought I'd post what I've got so far. My main project will end up being an animation of how PIV sex probably looks like based on data, studies and experiments done.

I'm far from being done, but I thought this first segment interesting enough to merit it's own topic. I've created a drawing (to scale) everything I have on male and female genitalia.

My motivation here is to quantify exactly why guys who boast about being long enough to hit a woman's cervix is absolute bullshit.

This first frame shows the penis and vagina dimensioned as accurately as I can:

http://s3.amazonaws.com/data.tumblr...196456&Signature=xS8XT884dKaNfmvaF2byKLFEEdE=

The second frame shows what happens when the penis is 2 inches inside:

http://s3.amazonaws.com/data.tumblr.com/tumblr_lzbfg9pRVO1roy9v5o1_1280.jpg?AWSAccessKeyId=AKIAJ6IHWSU3BX3X7X3Q&Expires=1329196504&Signature=5zzqsMh2FBqFqBoK5ks2+KWPt2I=

This one is 4 inches inside:

http://s3.amazonaws.com/data.tumblr.com/tumblr_lzbgt0CWKN1roy9v5o1_r1_1280.jpg?AWSAccessKeyId=AKIAJ6IHWSU3BX3X7X3Q&Expires=1329197797&Signature=w/8fYzx4Jwat4sA2YMr+RfwxboE=

This one is 6 inches in:

http://s3.amazonaws.com/data.tumblr.com/tumblr_lzbfgtIeHC1roy9v5o1_r1_1280.jpg?AWSAccessKeyId=AKIAJ6IHWSU3BX3X7X3Q&Expires=1329197821&Signature=WKvw8Wg3ieFh8j9FFAK+Wtgm0d8=

And finally, balls deep:

http://s3.amazonaws.com/data.tumblr.com/tumblr_lzbfhjMZBT1roy9v5o1_1280.jpg?AWSAccessKeyId=AKIAJ6IHWSU3BX3X7X3Q&Expires=1329197858&Signature=EWSTBe3CWeUnhgiXz6DL6Aaot50=

Hopefully this explains clearly enough. If anyone has any comments or criticisms, please be as brutal as possible. This is the start of a massive project I've been wanting to do for years.

Footnote:

If you're curious, the data on vaginal internal dimensions are based on:
Baseline dimensions of the human vagina

The original model for the vagina's cross section is from:
http://www.daviddarling.info/images/vagina.gif

The cross section of what coitus looks like:
http://www.e-radiography.net/articles/MRI Intercourse_files/MRI Intercourse.htm

How a tented vagina looks like:
http://www.the-clitoris.com/x/orgasm/respon2.jpg

And finally, the penis was traced from a photograph.

FYI the links don’t work, maybe it’s just because I’m on mobile idk