The wall mounted collar is nice but it is only half of the current solution. It is not really designed to support any weight, just keep you there in an upright posture. To really stop someone from dancing around excessively it will need some form of pelvic lock, of which I have designed this wall mounted hitch which acts of a manner as a One Bar Prision.

Note:

It is generally accepted as not-safe to 3D print insertable objects. The 3D printing process leaves behind micro gaps in the theads and layers that bacteria loves to thrive in. 3D printed parts cannot be cleaned without also destroying the part. None of these parts are designed to be inserted. It would be wise to place parts that may come into contact with bodily fluids in something like a condom prior to usage.

This design reuses the exact same tang and key lock system as the collar, just rotated 90° to spread force vertically down the wall. This is the double-slot wall bracket for dealing with someone who can get double penned or to come up with some other devious thing to be doing at the crotch area.

The coupling between whatever phallic object you need held must be resized depending on the object, but is universally compatible with the hitch by simply dropping it in. This specific coupling is sized for a bottle I like to fill with hot water. While still not designed to support the weight of a person this piece should be able to handle the extra force that will still be placed upon it from gravity and muscles.

To test both compatbility and strength I am actually going to print a single slot wall bracket first. Literally an exact duplicate of the one the collar uses just by repeating its print as the double slot version requires more material.

An intereting thing about black PLA is that all those little white specs, scratches, and imperfections, are only white to my phone camera. In real life its all just solid black to my eyes. I only ever really notice that on black and even across several brands now.

Probably the hardest part of this will be getting it on the wall at the proper height. Got a pretty good idea of the process I'll use to size it up though. The current theory is to first find the center line with the collar, press myself against the wall and place it such that the coupling is pushing into the taint. Experience tells me that this will hold the object I'm going to mount at its exact max depth. To get on and off to start with I'll just put heels on, hover over the hitch, kick a heel off, lower down, and kick the other heel off. Dismounting being the same process in reverse.

That or just hitching up then backing up to the wall. This is probably much more likely solo.

After spending the evening messing around with it, realized there was one more mistake made still. At first I thought the hitch just needs a longer bar to bring it away from the wall more.

However a perfectly vertical insertion is only really good for vaginal insertion from a standing position - after watching posture on cam and putting experience feels together eventually I remembered this was actually a problem already solved in one of my Skyrim models. The Anal Angle problem.

This occured to me at like 5am this morning so I got out of bed to quickly rip a 30° hitch out. A 20° one on the way as well which I suspect will actually be the magic sweet spot given that the final answer is always 2-3 iterations from my starting points, lol.

With all those parts finally done here is the entire rig up on the wall with all the various options I now have for the hitch holding this bottle I like to fill with hot water and sit on.

Of these choices the 20° hitch felt the best, but after all this now, think I might try a 15° one just for giggles. Im trying to achieve a flat press against the wall so it is a matter of finding the exact angle my body has while the pelvis is mostly relaxed. Even with the 20° there was a little bit of feeling like I needed to roll the top of my hip forward still a smidge.