I was laying on my side in bed on my phone when I noticed for some reason my sphincter was trying to contract by itself. No other muscles. I tried focusing on it and relaxing it every time it contracted to its natural state. By doing this, it would go back and forth w/ little to no actual involvement on my side aside from making it relax. I had a couple build ups leading to strong jolts of pleasure from it but that was it because I was tired and had a long day in class and took a nap.
I have noticed though that this seems to be really helpful in getting a sort of “passive” pleasure when I’m in bed on my phone. I recommend trying something similar. Like just focus on solely your asshole and trying to relax it and seeing if it comes back at you by trying to contract again to it’s natural state and then relaxing it again like a cycle.
Source: https://www.reddit.com/r/aneros/comments/t5hca6/sphincter_contracting_by_itself/
Yeah! Keep practicing and one day you may be able to experience full-on prostate orgasms by just letting your body do the job.
If I can give you a piece of advice : go with the water, follow what feels good and play with it.