With an enlarged prostate, why can't I simply push for a longer time to empty my bladder completely? Seems to me the pinched urethra should only affect the RATE at which I empty, not how much I can empty. There must be some sort of sensors or feedback loop that gets distorted, or something along those lines. If I can push enough to empty 3 oz. out of 6, I should be able to push longer to empty the last 3, no?