I remember the first time I prostate orgasmed was with a nice ribbed hairbrush handle (I threw it out after)
I must have been doing some right because I came 3 times or at least it felt like it, super intense and the feeling lasted like 10 minutes.
Afterwards for a little less than a week afterwards I felt really weird, not necessarily unpleasant and my.dick couldnt get 100% hard, it felt like I came all my manliness out and it had to recover.