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Sounds good to me as well, with practice you will be able to isolate the three separate movements, the first as you say flexes the penis, the second stage operates the sphincter and the third stage clenches the bum.
A frequent bit of advice is imagine trying to stop yourself from passing wind. Not to be done too often but when you are urinating try to stop mid stream, you may find you finish up clenching the bum but Still cannot stop the flow, don't worry it will improve.
Do not exhaust yourself doing too many PFEs.
This week I have stopped drinking caffeine after 18.00 and have gone through the night without getting up instead of visiting the loo anything up to six times a night.
Following my post op incontinence at night I wore a tenna2 pad inside some snug briefs and a pair of tenna4 pants over the top. I did a fair bit of travelling so bed protectors were not that practical.
Probably to early for this but at some point you need to believe in your head that you are no longer going to be incontinent.
Thanks Chris