I used to seek out the elusive prostate orgasm myself but, I stopped cuz I shifted gears into the wonderful world of topping (I got a new bf and finally had the opportunity to try topping). I never achieved the prostate orgasm but I share my experiences below. As for you, I don't know about the location of your prostate. I surmise that, yes, prostates are different for every guy but, I don't think the location varies all that much from guy to guy. For a long time, I felt like I couldn't find my prostate because I believed that when I "found" it I would feel an intense pleasure and that never happened. Well, I realized later that I was being silly. I'd been touching it for years haha. In story number 1 that I share below, I believe I started experiencing the "intense pleasure that feels like cumming" because of arousal and... surprise(??) haha
I've read on a handful of forums in the past where a lot of dudes were confessing their love of this type of orgasm and their stories, so it definitely seems like a real thing. One of my gay friends told me he had an anal orgasm once (not the prostate orgasm) from just the stretching of the ass and all those wonderful feelings. He said it was extremely powerful and centered in his ass and caused by the stretching-stimulating factor (he thinks). He said he ejaculated and that the orgasm was like full-body and it seemed to last longer. He was using fat dildo, like the circumference of a small wrist. He hadn't touched his penis, which he said was rock hard, at all. Also, like my story in number 1, he said it happened extremely soon after insertion and surprised him.
My experience with prostate orgasm is limited but here it is:
1) I used to bottom with my ex. He was an upward-curved guy. I was a voracious bottom at the time. When he topped me I would be rock hard the entire time, leaking precum and turned on without touching myself ever. He could plow for minutes upon minutes and I'd be painfully hard forever but with no signs of prostate orgasm, however. The only feeling I'd get is that interesting 'pee' feeling. However, I only felt the magical hands-free anal/prostate orgasm coming one time when we were in a semi-doggie style position, which was surprising since I thought that with an upward-curved penis that missionary would do the trick. It was surprising cuz he had just put his dick in me and started going (no foreplay, we were just really aroused at the time) and I felt the most amazing pleasure building in my ass. It was really powerful and totally took me by surprise. It was a really amazing pleasure, all in my ass. BUT, he came in like 1 minute! That was the only time he ever finished that early (normally he could go for minutes upon minutes). It was quite the unusual fuck session due to all those uncommon occurrences.
2) ~2 years later, single, I started using an average sized dildo or my fingers to masturbate frequently. I always focus on the ass play for a long time before I start touching my penis. Well, a few times, when using my fingers, I felt a growing tingling pleasure in my ass (and I could tell it was actually some form of prostate pleasure as my prostate is what I'd focus on when fingering myself). It would hover there and remain static indefinitely. But, I never came from it. It felt good though. Then, another time, I was using the dildo for a while, got really worked up and started jacking off. I was reaching the point of no return and I stopped working my dick-just pumped the dildo and the orgasm completed itself just with the ass-feelings. It was like the normal orgasm you have when you're jacking and getting fucked but just the ass half of the orgasm. I ejaculated too but there was no stimulation to the penis so I didn't feel anything from it.
Well, I hope that gives you some food for thought! I hope you do get the orgasm. Like I said, my experience is limited but my suggestion is to not think about the prostate orgasm a lot. Just get really into the sex or whatever and let the feelings in your ass flood your mind during sex. Good luck!