My experiences with prostate surgery will add another variation to the few responses on this thread. I, too, had cancer; it affected half my prostate. The cancer was detected after I had recurring tests indicating an infection of the prostate over a couple of years. Ironically, my PSA counts, the usual way prostate cancer is detected, were never elevated. A watchful urologist ordered the biopsies and the tests came back positive for cancer. I could have had the prostate frozen, been given the radioactive injections, had radiation and chemo treatments, had it removed with traditional surgery, or had it removed robotically through several small incisions. I chose the robotic removal for a number of reasons. The prostate was removed intact with no sign that the cancer had spread beyond it, but the vas deferens were removed at the same time as a precaution since the cancer was an aggressive type. I have been cancer free for a little over two years.
I didn't know until the time of the surgery that the prostate does most of the work in controlling peeing. Once the prostate is removed, you have to learn how to control pee and it becomes a very conscious effort. I never thought so much about peeing in my first 69 years of life as I have the last two years. One of the other respondents mentioned peeing all the time; that's no joke. After two years of working on retraining my body, I'm just now finally getting about 90-95% control of my peeing. I still leak if I pick up something heavy or strain my abdomen too much, but for the most part I have it under control. That's very important to me since I hate underwear when I have to wear clothes and in warm weather go naked as much as possible. Neither is possible if I'm leaking all the time, wetting my pants or leaving a trail of pee drops if I don't have on any.
Another surprise is that if a surgeon cuts out the prostate, about 1.5" of your urethra goes with it because the prostate is wrapped completely around it. So the surgeon cuts the urethra above and below the prostate, and once the prostate is out of the way, pulls the piece still attached to the bladder and the piece still attached to the dick until they meet and then stitches them together. That shortens your dick by whatever length of urethra was cut out with the prostate. I not only have a shorter dick, I have a foreskin for the first time in my life. (Since the bottom end of the urethra goes all the way to the tip of the dickhead, when the surgeon pulls on the other end, the head of the dick goes with it and slips up inside the outer skin of the dick. I knew all that was going to happen, and I had the surgery two years ago, and have not regretted my decision at all.
Unlike one of the other guys who's starting to feel some plumping up of his dick, I haven't had a normal erection for years because of ED. I did all the pills, and even before the prostate surgery, I began using shots in my dick. They work great. I give myself a shot with a very small needle, and in a few minutes I have a very hard cock, and cum or not, it stays hard for a couple of hours (or longer if I give myself more meds). Now that I have the peeing problem under control, I've returned to using the injections and my dick is just as hard as ever, and while my limp cock is smaller, my hard cock doesn't seem to be any smaller than before. I hope very soon to have the peeing problem totally under control, and with the ability to use shots, everything will be back to normal...at least MY normal.
As another guy mentioned, without the prostate (and especially without the vas deferens, too) you don't ejaculate anything. The pleasure or orgasm is still there...I haven't noticed any difference in that feeling...but nothing comes out. I've missed not ejaculating because I love cum, but on the other hand, it is nice to be able to cum and not make a mess.
If anyone has any questions about any of my experiences, contact me by PM. I don't mind.