I highly recommend getting a Hemorrhoid cushion, and just sitting.
Really, that is all you have to do. It puts just the right pressure where needed. Besides, the cushion really is needed, because otherwise, sitting is some positions can cause a lot of discomfort, or outright pain.
Over time, the prostate get more and more sensitive, and the body seems to automatically seek the most pleasurable sensations.
Really, I think that is the most basic programming of ALL life.
Seek out pleasure. Ovoid anything that is not pleasurable.
It takes a while, but it slowly gets better and better, over time eventually the O hits. But it keeps on going. It still takes a little while, but much sooner the second O comes, the third even faster, the forth faster, until pretty soon it is almost constant orgasms.
At this point, it is nearly impossible to concentrate on anything other than the constant pleasure.
I've found a sort of solution to the concentration problem.
Try to stop the orgasms. It isn't easy. Then gently manipulate the position you are sitting in. I call it the Sweet Spot. It is not as intense as the O. But it is damned good. And it never stops. Anyway it is easier to concentrate on something else. Even then, it is very easy to slip back into the constant orgasms.
And now for a question. How long is it safe to leave this thing in?