So, I advised Poopfinger to seek the advice of Dr. Satish Rao, the fecal motility expert with whom I had collaborated for the chat. She begged me to do it for her, which I did. I have been back in touch with Dr. Rao, and I have an answer for her, and it is conclusive. The good news, sweet lady, is that what you have has a name, is not serious, and is completely curable. The bad news is complicated, and it follows here:
According to Dr. Rao, you either never learned -- or have forgotten how -- to poop. The body does that sometimes, for all sorts of reasons. The condition is called Dyssynergic Defecation, a subject upon which Dr. Rao is a major-league expert.
Dr. Rao explains in an email: "The Oversharer has not learnt the art of pooping from childhood or she has acquired a new behavior wherein when she attempts to poop, instead of relaxing her anal muscles she paradoxically squeezes them, thereby retaining stool. So she has learnt the compensatory mechanism of digging out her stools to evacuate."
(Personal note: I love "learnt.")
This is a type of constipation, believe it or not. Constipation can mean either infrequent pooping or, as in your case, difficulty in doing it. Your condition accounts for about a third of all people diagnosed as "constipated."
Here's where it gets a little rough, sweetie: To cure you, Dr. Rao (or another specialist in his field) needs to stick a probe up your butt. It will be connected to a bunch of computers, with a visual display of the muscles in your rectum. You will poop, and the computers will detail -- so you can see, along with a specialist or two who are really, really trying not to grin -- how your muscles are misfiring. Your butt is like an engine where the timing belt is out of whack. The doctors will then instruct you in the proper muscle sequencing, which you will learn to do via biofeedback. This works.
When I told my friend Caitlin about this procedure, she said that rather than underdo this, she would sooner just quietly expire. But you, young lady, I believe are made of sterner stuff. You are an "Oversharer," as you say, and I am convinced that you will endure this (possibly even slightly enjoying the attention) and at last be cured, thanks to the good offices of the Great and Dignified Washington Post. You are most welcome.
(Note: Dr. Rao offered to treat you at his clinic, which is in Georgia, but says that other specialists in this can be found. Dr. Rao is very findable on the web.)