Patient's question:
I originally thought the vagina was a "smooth tube," but recently when touching my wife, I found it's not a pure cylinder (the cross-section isn't round). Instead, there's a "ridge" attached to the upper circumference, running along the direction of the vagina, somewhat resembling an "" shape. I'm not sure if I described it clearly, but perhaps a diagram would make it clearer. Is this normal? What should the normal shape be?First follow-up question: But it's not "posterior" either—it's like that from the moment of entry.
Moreover, when the penis enters, it feels tight, mainly due to that "ridge." I estimate it would be better without that ridge. So...
Doctor's answer:
Hello: Yes, it is normal for every woman to have this, and through the vagina, the cervix can be seen. It's just like a child's mouth.