Incontinence during sex is a long-lasting problem for roughly one in eight men who have had their prostate removed due to cancer, a study of more than 1,400 patients has found.
via After prostate surgery, some men leak during sex | Reuters.
This article describes that some men will have loss of urine during sexual intercourse. This usually happens during climax. The article refers to this problem as climacturia. I have seen men that recover normal erectile function, but have this problem of leaking urine during intercourse. It usually improves with time but not always. I have not kept accurate statistics on this problem, but have a feeling that it is less with robotic surgery for my patients.