Given the current market of VR sex sims, this is quite impressive and I look forward to seeing how it improves!
I also have some constructive criticism which I hope is helpful:
1) While the physics and VR IK are good, it is quite difficult to enjoy many of the positions in VR just because you can't actually see anything (e.g. any time the player is receiving). The camera helps to alleviate that, but I have an alternative suggestion from a skyrim vr mod (specifically sexlab + VRIK). When in a locked position, add an toggle which basically duplicates the characters body in the existing position while making your own invisible (or say transparent for an out-of-body experience). That would let the player move and observe what happens to their 'real' body without breaking immersion and would allow the VR version to make good use of the animations you made for the desktop version.
2) Please change the riding system to not use continuous turn. I know it looks better that way, but that will make almost every VR player sick unless they choose to ride in a straight line. An option for this would be to decouple the drake's rotation from the player when riding and leave the standard rotation options for the player's view.
3) The control interface, while functional, is pretty unintuitive to figure out initially. One way you could change it to make it a bit more intuitive would be using the right stick click to bring up the command list for the drake (e.g. Alyx weapon swapping style). You would still need your own action menu bound to a button, but I think that would still be more intuitive.
4) I would make the 'main' menu appear as an interactable camera-screen object which floats in place instead of tracing the player view. When adjusting settings like player body type in the mirror, the menu itself tends to block your view.
5) I would also agree that the drake/griffon could use more sound feedback to indicate they are enjoying themselves. The meters on your wrists are useful in some positions, but if your hands are occupied (in game doing something or otherwise), it isn't particularly convenient to look at. I would recommend Heat as an excellent reference for good character reactions and audio.
