I feel like I did experience that, although not to its fullest extent due to the constrictions of being performing solo work on myself, and without adequate toys. I can tell you by my sporadic anal self-pleasuring experiences that the orgasms are way more powerful than regular ones. I did read online that prostate stimulation orgasms are comparable in intensity to women's G-spot orgasms; I guess that is just true. The few times I tried it myself I feel like I did enjoy only half the pleasure I might have reached had I been with a skillful partner performing actual milking of my prostate. And despite all the shortcomings of my experience, they were still some very intense, leg-shaking orgasms nonetheless. Hopefully, someone else has more relevant, specific experience and insight to share on this subject.