Side-note: This doesn't work so well for bigger, weightier models like the original Progasm.
Aneros is about contracting muscles (your ass/perineum) to massage the prostate hands-free. If that hasn't helped much, or to just provide something new (as was my case), try this whilst standing:
Do some gradual slow squats, making it imbalanced. By this I mean to slowly bend one of your legs down, followed shortly by the other — then lift the initial leg back to straight. Do that in a cycle, where your hips are tilted back and fourth as they go up and down. In other words, you'll be doing a stripper dance of sorts.
That'll sound awkward to some but here's what I found — as my legs were bending asynchronously, the prostate gland was rubbed in a noticeable, powerful way (that wasn't possible bending them in union) namely because, I believe, the feet were planted on the floor. Lying down, the leg muscles aren't engaged — but maybe you noticed the temptation to shake them when an orgasm approaches. That, I think, is one factor — standing enables the leg muscles to cycle the arousal in a productive fashion rather than just wobbling them and letting it go no where. Perhaps that's why a few individuals get awkward boners during stretching exercises.
I discovered this years ago and it doesn't always work*. Overall this works better after a while into a session, when you're already quite in tune with the prostate. However, the first time I did it, the orgasms were very powerful and after a while when laying down thinking I 'finished', one of the biggest orgasms hit me out of no where, my fantasies went into auto-pilot and I thought I was going to cum. I stopped because my moaning was getting too loud and potentially noticeable.
Trying it again last night, though, I was producing a whole load of precum. Again, there was setup before the 'dance' squat, but I thought it was easy to see why it was working as strongly as it did.
Hope this might be of use to some!
*Like any technique, I think there's a case of burnout/exhaustion in what it provides. That's often why, when I have a 'eureka' moment in a session, I hold off telling the users of it until I can replicate it and that it wasn't because of some other unknown factor.
**Alternatively, some light jogging on the spot also worked for me, for similar reasons.
