Since this is the first entry i shall introduce myself. I allready did that in a forum post, so i'll just copypaste that:
I don't know if this is that unusual, but I discovered this whole meditative hands free prostate stimulation thing on my own, before I even heard about the aneros. I was 15 or so. English classes were very boring, but my teacher was hot. So i stared at her, undressing her in my mind and flexed those muscles. What I discovered changed my life. Finally I had a meaningful activity I could do in school. Since I spend a lot of time in school, I really could improve my technique.
When I'm really horny and relaxed the sensations I can archieve are similiar to what aneros users discribe. I get those involuntary convulsions and my state of mind is completely altered. I feel like I am just a big prostate and there's nothing on my mind but that incredible buzzing and twitching. Unfortunately this state isn't very sustainable after 20 min or so it goes away. I don't think I already experienced what you call the Super-O. I just need something that helps me to keep going; something that pushes me over the edge.