How we (men) control our flow ...

Hi all,

Still trying to understand the reason why we often end up leaking (especially given how much a pain it is to many) after prostate work and this is my interpretation so far.

From Wiki (and other places etc), there are basically two sphincters that do this, one involuntary (It happens on it's own, by default, we don't have to think about it), one voluntary (that we actually have to make happen ... like for the few seconds when doing PF exercises)?

The involuntary one (internal urethral sphincter) is in the base of the bladder and is the primary one, typically staying closed unless we intentionally decide to let it go.

The voluntary one (external urethral sphincter) is secondary, below the prostate and supported by the pelvic floor muscles and so only activates (closes) when we ask it to, like if we are busting to go to the loo but can't for some reason (or typically women after childbirth when they cough or sneeze).

So, what is it that happens during prostate work that negatively impacts the primary sphincter in the bladder??

eg, If say surgery interferes with the secondary sphincter / valve, the only one that interacts with the PF muscles, how does that explain us leaking when it's never the one that normally (subconsciously / involuntarily) holds any flow?

I can see how doing pelvic floor exercises would help prevent surges (like when we are 'busting' or sneeze etc) but not the everyday 'just going for a walk and don't need the loo' type?

Personally, I think it may have more to do with having a catheter stuck though the primary sphincter for a couple of weeks and not allowing it to close properly (muscle wastage, 10%/week or distortion) may be more to do with it but I'm hoping someone with the right medical qualifications could give me the right / medically provable answer please?

If it is the primary sphincter that becomes 'effected' because of the catheter, what if an alternate solution could be found, especially considering how negatively impacting on everyday life it seems to be in some cases? Like, what if the urethra could be joined internally and externally where the internal joint protects the join from infection and allowing it to heal and then dissolves away, once the external one has also healed to return full flow?

Interested / engineering / practical minds etc.