This regards my experiences pre and post prostate cancer treatment. 72 YO. External Radiation with hormones. Prior to diagnosis, my libido was good. Being interested in sex is important to quality of life. So is performance. For me there is one more facet to male sexuality. Sensitivity. So all three must be present for satisfying that aspect of quality of life for me.
The first to go several years prior to PC was ED. Tried pills (expensive and not always effective). Side effects too. So I had heard about pumps but thought it sounded kinky. I finally tried the pump and have been happy with the results. No worry about ED. Pumps always work. At this point I had libido, sensitivity and the big E.
After PC treatment, there is NO libido. Testicles shrunk, chemical castration. I thought Sex was now in the past for me. But I missed it. A lot. I didn't even think about sex for weeks.
I am an experimenter by nature so I found a way to get some enjoyment back. I found that my libido was reignited by porn. Once interested, the pump gave the E. Now the third part, sensitivity is inconsistent and I don't know why. But when all three are in sync, I felt normal. I do have to push myself a little to get the process started because of the absence of libido but once I get going it's enough for me.
Now for guys with a significant other, the pump thing may be too weird and that's too bad because both of you will be glad you put up with it. An open discussion about sex and needs may not be easy.