I had radiation but have the same side effect and, after I finished with ADT and started getting horny, it was disconcerting to say the least and initially made me hesitant to even bother. But as my T keeps returning it feels like I'm going through a "second puberty" (body hair coming back, I have to shave again, get erections at inappropriate times, having sex dreams at night and, of course, being horny almost every day). At first I was asked if I "faked it" because there was nothing to show but that was my partner's insecurity and we've moved past it. Pelvic floor exercises will REALLY help improve orgasms. I've been doing them for a couple months now and notice a definite change for the better.