Ok you guys. Do you have eyes at the ends of your cocks, or X-ray vision, or what? I can feel the end of my penis touch "bottom" in my wife's coochie in some positions, but I have no idea if I am up against her cervix, her anterior fornix (sometimes referred to as the "epicenter") or her posterior fornix/vaginal cul-de-sac.
Can you guys really tell, or are you just guessing?
For the record, I am just shy of 8" BPEL but have an "insertable length" more like 7.5".
You should be able to feel the cevix, its like a ball in the air. When you feel it, if you angle your dick upward and stroke against the area in front of the ball it should be the a-spot.
Of you angle your penis down and go below the cervix, you'll find the cul-de-sac-
I think it's crucial to find the cervix, otherwise it's just pure guessing.
Here's a good picture of the cervix:
http://www.myvaginasite.com/photos/rachel_cervix_12.jpg
As you see it's like a ball. When aroused there will be space to go under it and beyond. But in that picture there are no space, probably since she's not aroused. That's another important factor to have foreplay. (if you want to have great sex and have a big penis).
Here's a good diagram showing an aroused vagina:
http://www.penissizedebate.com/images/doc/vagina_tented.jpg
As you see, there's room under the cervix.
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