I went through trial and error when it came to P-spot stimulation and eventually the P-spot triggered orgasm which was absolutely amazing. I have tried many toys but only one was capable of getting me there and had me shoot the biggest loads with the best orgasms: it was the njoy Pure Wand.
It is kind of expensive and I did later find out that there are much cheaper alternatives on Amazon.
The cold metal pressing up against the prostate and the weight + gravity working with you when on your back. It just feels good. And until you eventually reach that point of no return, you are milking that prostate and the precum comes flowing out.