The old time treatment for prostate trouble was to get a prostate massage.
This technique would use finger pressure to force out the prostatic fluid.
The nurse would digitally massage the prostate…this would cause you to “ejaculate” without the contractions that normally express the prostatic fluid…so it is like cumming without any feelings of orgasm.
I was told by an old time nurse that “men never missed their appointments”. :)
So if your prostate is filled with a lot of fluid, and a firm to hard bowel movement presses on it…it makes sense that it will press out some prostatic fluid.
Of course this is not accompanied by the feeling of orgasm, because you aren’t having an orgasm, you are merely mechanically pressing the prostate, causing some of the fluid to be pushed out.
Personally, when I “pass bowels” (my gal’s) many times I get quite a bit of ejaculate escaping! :)
RWG can give the details on how that is done correctly.,