Holding and wetting are mutually exclusive concepts to many, but they're like chocolate and peanut butter to me. Tonight, on the second day after a capacity hold, I've had some excellent fun working the differential between bladder and urethral strain, doing a little bit of both. Using only a padded rocking chair and a single posture, I enjoyed a five-hour multiple orgasm of pee! Like a lost terrapin, I think I've finally found my niche; and I seriously wonder how I'm not going to let this become a compulsive obsession.
Since my bladder neck was strained previously, I started leaking at relatively low bladder volume, as assessed by the Pillsbury test. The key discovery was that at this lower pelvic pressure, I found it very easy to hold the urine by contracting my hips, even as the bladder neck was completely relaxed. I simply raised my knees, shoulder-width apart, to a bit higher than my hips, threw my head back and arched my spine. This basically focused all the normal force to my ass, in support of my pelvic floor, while the rocking chair helped to maintain balance. In this position, for the first time, I was able to suppress the reflex to push, which is usually the abrupt, climactic end to my holding.
Over the course of three hours, little ejaculation-like leaks spurted forth at shortening intervals, with increasingly sore pleasure sensations in the urethra. My bladder continued to fill until the Pillsbury test was positive, at which point the dynamic turned, leaks became larger, and my bladder gradually emptied -- over the course of perhaps another two hours. Even on the decline, though, every leak was more raw and wet than the last... until finally I just couldn't take the pain, and pushed out the last cup or so of pee, with the concluding interval between urges lasting about 10 minutes. My sense is that this fully utilized all my urine for pleasure, as opposed to wasting 500 retained millileters on an after-shower pee when my bladder is deformed to full capacity and suddenly emptied, unable to immediately rebound. And I was still drinking throughout this process, though not as much as usual when I intend to have fun.