A trick I learned and experienced many years ago, visiting spas. Where I was working, guys always talked about going. The one that I frequented was one that gave a table shower, then you warmed in a small sauna for a few minutes, then given a massage. Yes, they were happy ending massages. The masseuse would use a finger, well lubed, and as she was jacking me off, slide that finger in my hole, and as soon as she tickled my prostate I would have my happy ending. If I was having trouble later with women I dated, I would ask them to use the trick and it always worked. I never found any thing that ever worked as well as her finger just inserting, and pushing lightly forward against my prostate. Best of luck