Thanks to @colleenyoung I am coming in to your discussion @barryallen8 and I hope we can shed some light on the situation you're experiencing. I don't have a concise explanation covering your symptoms, so I'll set off on a stream of consciousness description of my situation and how it might lead to answers.

First, a little on my background in bladder and urethra functions. A few years ago, my prostate gland had grown to abnormal size and invaded the lower end of my bladder, causing severe incontinence of my urine. My urologist called it Benign Prostatic Hypertrophy (BPH) and arranged for surgery in a hospital and a stay overnight to ensure recovery was happening. The surgery involved no cutting through the skin; instead it was Transurethral Resection of the Prostate (TURP). It involved inserting a cystoscope (with lighted lens) through my penis, along the tube (urethra), through the bladder sphincter, and into the bladder. A clipping tool on the cystoscope snipped off many pieces of prostate tissue until the prostate bulge protruding into my bladder was removed and the pieces vacuumed out. Within two weeks, my recovery was complete.

Since then, my urethra and bladder sphincter have been invaded by cystoscope more than two dozen times. This unusual practice would not have been needed if it weren't for papillary cancers found on the lining of my bladder after the excess prostate tissue was removed to expose them. A dozen of those tumors were removed through the urethra with a procedure performed in a walk-in surgery center. All of them were regarded as aggressive, but not a major threat, because they were found and removed before they rooted into the muscle of my bladder. An immunotherapy treatment cleared any malignant cells, and my regular cystoscopes -- now performed annually -- confirm no tumors have survived to cause future problems.

All of this explains why I'm especially conscious of (and sensitive about) my ability to control urination, despite dozens of intrusions by cystoscope through my urethra and bladder sphincter where I also experience a "twinge" to release urine. Compared to your situation @barryallen8, my twinge has not moved from the base of my penis and bladder, although on rare occasion there is no twinge and I wet my pants or the urinal. As a result, I carry a half-dozen urine pads in my brief case or in my back pack in case of an impending urinary accident!

Against that background, you can see that I'm puzzled about how the urination "valve" in your sphincter could migrate down the urethra toward the tip of your penis. Let me sleep on that and provide some further thoughts in the morning. Martin