I have tried this around 10 times during the las 6 years (I’m aware I was not being persistent) very few times and almost most of the times I got bored of aneros and switched to dildo, then got tired and stopped and never really gave aneros a chance except for two times.
Today, after a month of no fap I decided to try with aneros (the basic version) and it worked, instead on focusing on anal quick contractions, I focused on more extended full body contractions, aligning some strength from my legs to help the anal contraction, I was watching some porn but stopped it since it was a distraction
Funny thing is I tried 3 times with a prostate stimulator which has a rotatory head and I didn’t let me focus on the sensations
Long story short, I followed a recommendation to try to feel the prostate with the finger first to know where it is and how it feels, spent 1min exploring that, then around 15min of aneros and came really hard, after it I had and still have, a sensation of floating, relaxed, quite the opposite of the normal masturbation which afterwards makes me feel tired, maybe the 1 month no fap influences here!
I’m really happy since I had already gave up on this, I hope this has been informative, happy orgasms ☺️