I have always had an interest in inserting thin objects into my urethra, and now manage a large-diameter pencil. It really feels thrilling, and depending on the mood, I tend to orgasm. My question is: how much can the urethra in a woman stretch? I have also inserted the same into my cervix; are there dangers in either?
There is no question that the urethra, or at least its surrounding tissue, is sexually sensitive.
Ernest Gräfenburg's orginal break-out paper was called "The Role Of Urethra in Female Orgasm" and figured the locus of internal vaginal sensitivity (later called the G-spot) to be the area of nerve-rich erectile tissue wedged between the urethra and the upper wall of the vagina. You stimulate the paraurethral area though the vagina. There's no reason it shouldn't work from the other direction. Except for that pesky business about the vagina being thickly muscled, tough, flexible, and dead-ended, while the urethra is relatively inflexible and fragile and leads directly into the bladder, which leads to the kidneys, which you do not want to mess with. But assuming you are real and really female, you have already done this and lived to tell. Yay for you. Your job now is either to quit it (recommended) or find a very clean and safe way to do it.
I was intrigued to hear from a physician (this was 10 or so years back, but not, like, 40 years back) that little girls are routinely brought to emergency departments with hairpins in their urethras. Let's say that "hairpin" was just shorthand for "small, easily accessible, and inappropriate random object" and consider why it's a bad idea: small things get lost; easily accessible random objects are dirty; and small, dirty objects loose in your urinary tract will cause infection and may cause perforations. Either way, you would end up in the ER. The only appropriate object for urethral insertion is a urethral sound, or something as smooth, appropriately sized, long-handled, and sterilizable as a urethral sound. Does any of that say "Use a pencil!" to you?
As for the cervical insertion: I will admit that it ought to be technically possible. The cervix, even in a woman who's never been pregnant, is closed-ish but not entirely closed, and it waxeth and waneth like the moon. You do hear of people doing cervix "play" or see pictures of such things on the Internet. But that does not mean you should do it.
For one thing, there's pain. If you have never had a baby or a miscarriage (I have had both, and may I add OMG) or really horrible menstrual cramps, you have no idea how much having your uterus cranked open hurts. That muscular organ, inevitably referred to as "fist-sized," is usually clenched down tight, and for a reason. Anything introduced in there can perforate, causing peritonitis and possible death, or just plain infect, causing peritonitis and possible death. If you do not want to risk peritonitis and possible death, please just leave your cervix alone. It has a job to do and does not need you interfering with it.
See Andrea's other column at carnalnation.com.