The vagina also has the equivalent of the coronal hook.  Medically, it's called the carina.

It could just as easily be called the carinal hook.

Because, when the natural penis withdraws on the outstroke, the carinal hook captures the foreskin.
As does the coronal hook.  The foreskin gets penned
in between the carinal hook and the coronal hook,

During intercourse thrusting, the foreskin continually bunches and un-bunches against the roof of the vagina.

For the woman, the rhythmic bunching and un-bunching of the foreskin during intercourse creates sexual excitement by alternately applying, and then releasing, pressure against the highly erotic G-spot (that triggers orgasmic pleasure)
in the roof of the vagina.

IN SUMMARY: The foreskin is a natural gliding stimulator of the vaginal walls during intercourse, increasing a woman's overall sensual excitation and helping her achieve orgasm more easily and more often.

Conversely, the circumcised penis has no soft, pliable, cushiony foreskin to bunch and unbunch. Instead, the constantly exposed, stiffened, flared out coronal hook continually scrapes the walls of the vagina, creating discomfort.

WOMAN'S COMMENT: I was married to a circumcised man for almost 20 years.  I've experienced all the uncomfortable physical problems you mention at your website.

Furthermore, I always knew that whenever I felt especially sore after sex, I could be in danger of getting a urinary problem, like cystitis, or UTI infection.

I'd call my doctor to ask about what to do when I felt a urinary problem coming on and he'd always ask me jokingly "too much love...?"

The most shocking thing of it all is that doctors are so used to thinking of circumcised sex as "normal," they don't even wonder about the weirdness of it all: That sex sex can lead to urinary infections in a woman.  Looking at the exposed coronal hook, I know, now, why this could happen.

COMMENT WOMAN #2:  My husband is circ'd.  After I was married and had gone to my doctor several times for what I thought was a urinary tract infection, he "corrected me" and told me that it wasn't a UTI.  He told me it was irritation from sex.  Friction inflamed my urinary tract, basically.  It usually would "settle down" after a few days without sex.

COMMENT WOMAN #3:  My husband and I had sex last night and after having just read about the coronal ridge and thrusting, I was very curious to see how our experience compared.  I generally enjoy sex with my husband.

I did, indeed, feel irritation from the coronal ridge. This is something I'd never paid attention to before even if I had felt it.  It was heartbreaking to know and realize the discomfort (although minor) and its cause.  The feeling continued for at least an hour after intercourse.  I had difficulty sleeping, not because of the sensation, but the heartbreak of being aware of this result of circumcision.