Not to be crass but “sounding” would be most likely to provide urinary relief as this widens the urethra within the prostate gland. This is absolutely not medical advice, just a follow-on to your quip.
Definitely not medical advice, but a friend's father took turkey tail mushrooms as part of his prostate cancer treatment and it seemed to help. An extract of it (PSK) is pretty commonly used in Japan [1].