According to one urologist named Dudley Danoff, from a MEL Magazine article, it is not something that happens. So, while this is just one doctor’s report over a lifetime of patients, this would seem to indicate ejaculation during a prostate exam is exceedingly rare. Hope this helps. Cheers!
Here is an article with a snippet from the interview referenced. The whole interview is readily available on YouTube if you do a quick search. Hope it helps. https://www.wizmnews.com/2024/08/08/vance-jokes-hes-checking-out-his-future-vp-plane-while-overlapping-with-harris-at-eau-claire-airport/ Cheers!