The cervix is not the end of the vagina!

[RawDog]

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.com/tumblr_lzbffhPs3C1roy9v5o1_1280.jpg?AWSAccessKeyId=AKIAJ6IHWSU3BX3X7X3Q&Expires=1329196456&Signature=xS8XT884dKaNfmvaF2byKLFEEdE%3D

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

http://s3.amazonaws.com/data.tumblr...196504&Signature=5zzqsMh2FBqFqBoK5ks2+KWPt2I=

This one is 4 inches inside:

http://s3.amazonaws.com/data.tumblr...197797&Signature=w/8fYzx4Jwat4sA2YMr+RfwxboE=

This one is 6 inches in:

http://s3.amazonaws.com/data.tumblr...197821&Signature=WKvw8Wg3ieFh8j9FFAK+Wtgm0d8=

And finally, balls deep:

http://s3.amazonaws.com/data.tumblr...197858&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:
http://humrep.oxfordjournals.org/content/21/6/1618.full

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.

 

[B_subgirrl]

RawDog, I love you! You're such an . . . engineer! :tongue:

The last one looks all deliciously snuggly to me. Just the way I feel when he's lodged in my deep spot.

The earlier ones also look the way they feel.

Well done!!! :biggrin1:

Edit: Although you should have added the 'We're all snowflakes' thing.

 

[The Dragon]

Fantastic work as per usual, RD!

 

[Wrat]

Cool drawings.

 

[D_Anna_Wreckzia]

So you're saying no one is long enough to hit a woman's cervix?

 

[B_subgirrl]

So you're saying no one is long enough to hit a woman's cervix?

Do you even know where the cervix is?

 

[HornyToad11]

So you're saying no one is long enough to hit a woman's cervix?

I think he is saying that anyone over 4 inches will have no trouble touching the woman's cervix...

PS. Great thread RawDog.

 

[redbear52]

I like your drawings.

I think it is important to note that the sagittal section diagram of female anatomy on which your schematics are based does not apply to all women. It shows a typical anteverted uterus lying over the urinary bladder. This anatomical arrangement might describe the majority of women, but quite a few have a vertical or a retroflexed uterus:
Retroverted uterus | Better Health Channel

In those women with a retroflexed uterus, the cervix may not project into the anterior aspect of the vaginal canal. It may project more end on into the vagina and be much more likely to make direct contact with the penis during sex.

Also, the penis does not necessarily enter the posterior fornix, as you show, during deep penetration. MRI imaging has confirmed that it may (at least in some cases) be directed towards the anterior fornix during face-to-face intercourse, and a normally anteverted uterus might actually retroflex rather than draw forward during intercourse.

I suspect that exactly where the tip of the penis winds up is going to vary with the couple's particular anatomy, as well as the position used.

I can tell you that I had a couple of partners with whom there was no avoiding their cervix in some positions. It simply wasn't possible to "slide past it" as shown. With these women, certain positions were absolutely off-limits.

 

[RawDog]

RawDog, I love you! You're such an . . . engineer! :tongue:

Thanks! I was debating whether or not to keep the dimensions on frame by frame, but it was starting to get too nerdy for me.

The last one looks all deliciously snuggly to me. Just the way I feel when he's lodged in my deep spot.

Excellent! That's exactly what I wanted to convey. That's exactly how it feels on my end, and to know that's what it feels on a woman's end is the kind of feedback I needed.

The earlier ones also look the way they feel.

Also excellent feedback. There's a certain amount of squishyness I still lack in these, but the message is coming across. I can't wait to figure out the animation part.

Well done!!! :biggrin1:

Again, thanks.

Edit: Although you should have added the 'We're all snowflakes' thing.

Agreed. I wanted to put the images up and somehow put a distinct watermark on it so if (or when) it starts getting viral I still get credit for the image. The name of the tumblr, inyourcunt, was MrsR's idea by the way. We're all snowflakes would make a good addition to the blog.

Fantastic work as per usual, RD!

Thank you! This is the very tip of the iceberg I'm planning. Once movement comes into play (especially if I can flex certain parts) it'll be clearer.

Cool drawings.

Thanks! See, you people are starting to get a glimpse into what happens in my head when I watch porn. I'm kinda embarrassed to admit that.

So you're saying no one is long enough to hit a woman's cervix?

I think the next two replies answered for me.

I think he is saying that anyone over 4 inches will have no trouble touching the woman's cervix...

DING DING DING! You get the prize! That's exactly what I'm saying. No matter how many times it's mentioned here, it crops up again and again. I figured having solid scientific numbers and an image will at least shorten the discussion.

PS. Great thread RawDog.

Thanks!

 

[WeirdLabs]

Excellent work.
I am absolutely sure that you got it right, the drawings are spot on imho.
When I am with a girl I _always_ manage to get my dick past the cervix and pushing into the posterior fornix above the uterus. And given enough time and practice the posterior fornix can actually stretch some allowing deeper penetration.

 

[RawDog]

I like your drawings.

Thanks!

I think it is important to note that the sagittal section diagram of female anatomy on which your schematics are based does not apply to all women.

Yes, I wanted to take a shotgun approach and get the most common condition first. In time, I'll have other images for a tilted uterus, vaginas the have gone through hysterectomies with the cervix intact, and hysterectomies without the cervix. In fact I plan to have images where the cock's thinner, thicker, longer, shorter, bent up or bent down.

It shows a typical anteverted uterus lying over the urinary bladder. This anatomical arrangement might describe the majority of women, but quite a few have a vertical or a retroflexed uterus:
Retroverted uterus | Better Health Channel

Yes! This exactly what I need. I've never had sex with anyone with a tilted uterus who had painful sex, but hopefully I can open a dialogue with more women who are open to discuss these things and possible solutions and post those ideas in the form of images.

In those women with a retroflexed uterus, the cervix may not project into the anterior aspect of the vaginal canal. It may project more end on into the vagina and be much more likely to make direct contact with the penis during sex.

I'm wondering if the anterior fornix is what is more pleasurable/more easily accessible in situations like that?

Also, the penis does not necessarily enter the posterior fornix, as you show, during deep penetration. MRI imaging has confirmed that it may (at least in some cases) be directed towards the anterior fornix during face-to-face intercourse, and a normally anteverted uterus might actually retroflex rather than draw forward during intercourse.

The sex in an MRI articles are one of the sources of inspiration for this project. I saw a video of the MRI shots in sequence too. I have it on my hard drive, let me see if I could find the link.

I suspect that exactly where the tip of the penis winds up is going to vary with the couple's particular anatomy, as well as the position used.

Again, the sex in an MRI was done in very cramped quarters in missionary. Like you said, the shot of the penis entering the anterior fornix may have a lot to do with how low his pelvis was compared to hers.

I can tell you that I had a couple of partners with whom there was no avoiding their cervix in some positions. It simply wasn't possible to "slide past it" as shown. With these women, certain positions were absolutely off-limits.

If the word impossible is used, then g-spot stimulation would have to be the best kind of coitus they can achieve with mutual satisfaction. Another project right there is hatched:

http://24.media.tumblr.com/tumblr_lzc6z5yiue1roy9v5o1_250.gif

I am so very grateful for this feedback! Keep it coming!! The fact that it's in a thread makes it easier to discuss and be motivated.

 

[petite]

This annoys me all the time. Even that Come Close website that sells the sex donuts makes that error, claiming that it helps solve the problem of hitting the cervix.

When my guy hurts me because of his length, it isn't because he has hit the cervix. He hits the end of the cul-de-sac.

 

[RawDog]

Excellent work.

Thank you. Stay tuned, I'll have many more images I want to upload and talk about.

I am absolutely sure that you got it right, the drawings are spot on imho.
When I am with a girl I _always_ manage to get my dick past the cervix and pushing into the posterior fornix above the uterus.

When you say above, I'm automatically assuming this is in the doggy style position. In missionary the uterus would be above the posterior, if she were flipped around the uterus would be below (and vice versa if she had a tipped uterus).

And given enough time and practice the posterior fornix can actually stretch some allowing deeper penetration.

I agree but with so many caveats. Some guys can't reach that deep, some women aren't really that interested, some people just don't get the angles, etc.

 

[RawDog]

This annoys me all the time. Even that Come Close website that sells the sex donuts makes that error, claiming that it helps solve the problem of hitting the cervix.

When my guy hurts me because of his length, it isn't because he has hit the cervix. He hits the end of the cul-de-sac.

Here you go. I added some bits I missed before to accentuate your problem, but this is it?

http://29.media.tumblr.com/tumblr_lzc8dxcA0m1roy9v5o1_r1_500.jpg

 

[D_Terry_Tugnuts]

Thanks for those graphics! After a lifetime of getting my cock into as many cunts as I could, and as often as I could, I had no idea it was like that inside!

 

[RawDog]

The sex in an MRI articles are one of the sources of inspiration for this project. I saw a video of the MRI shots in sequence too. I have it on my hard drive, let me see if I could find the link.

Found it: Improbable Research Collection #119: MRI Sex - YouTube

Thanks for those graphics! After a lifetime of getting my cock into as many cunts as I could, and as often as I could, I had no idea it was like that inside!

I really hope you're not being sarcastic, because that is a very very awesome compliment. Thank you!

 

[RawDog]

...mushroom heads, more pronounced clits, closer to the introitus clits.

(My to-do list)

 

[eurotop40]

Is the rectum longer than the vagina?

 

[D_GlennFeckless]

Is the rectum longer than the vagina?

Similar in depth, but after the rectum one encounters the sigmoid colon, which can also accommodate. From there, if properly straightened, comes the descending colon.

Great stuff, RD. Thank you for the very illustrative work. What software were you using?

 

[B_enzia35]

I like the engineer comment, you make this all so scientific!