I've got BPH, (Benign Prostate Hypertrophy.) It definitely takes me longer to pee than it used to, but I'm not quite to the point of needing to do anything about it. A saddle might irritate it, but won't cause it. In fact, nobody seems to be able to tell me exactly what does cause it, other than to tell me to quit whatever it is that I'm doing.
I won't say the "R" word.