Moaner sipping out...

[estimator]

Thanks to everyone for taking the time to reply.
Some interesting 'workarounds'...
The bobble has arrived so I'll give it a whirl and see how it goes.

[spini]

A simple solution is to wear a pair of knickers or a thong. I found you can put the crotch between the connectors and will hold an anal probe in place.

You can get nice ones designed specifically for males with a suitable hole to drop your tackle through allowing you to still play.

I like that!

[Hastur]

So, I have tested my moaner with Joanne's modified neck, and it stay in place better. Moreover, the added texture feels really nice while ghost fucking

[joannesReviews]

So, I have tested my moaner with Joanne's modified neck, and it stay in place better. Moreover, the added texture feels really nice while ghost fucking

It's good to know that it hits the spot for you.

[StimJoy]

Gosh, I resolved the issue of the Moaner, and my modified Aneros Progasm, slipping out by buying a decent quality leather anal plug harness. The front has a good sized metal ring for you cock to go through, and it comes with some leather pieces that fit around the plug of your choice and snap onto the strap going between your legs/cheeks.
Cinch it all down and that plug is going nowhere; even with it tightly cinched up you still get great involuntary anal ghost fucking movement. So now you can be standing, sitting, on hands and knees, whatever. I do need a small pillow under my lumbar when on my back (or just be on a soft bed), as the metal cinching point is right there (can be a bit uncomfortable on a solid floor surface).