Buddy Blank, as was reported in the article abstract (link) you provided, brachytherapy/radiation therapy side effects tend to be both late-term (as opposed to short-term or immediate-term), and under-reported. We had interesting discussion HERE
in a thread before you joined HW about
under-reporting of RT effects and why that may be...perhaps of interest. The men who experienced increased pain during ejaculation were not discussed then.