ED secondary to prostate cancer and nerve sparing Da Vinci robot procedure. Happened accidentally to stumble on Erektor. (That’s really sad). It works great. This is really life changing for me. I was like a teenager having sex for the first time!! Since my prostatectomy I don’t ejaculate; therefore; I don’t have a refractory period. End result= sex as long as I have the energy for it. I can see how this would GREATLY HELP premature ejaculators. Thanks for a fantastic product.