petermc but like others have said there is nothing stopping any of us getting into the positions and acting out what it is we wish to fantasise about. It seems many of us just want to consume VR porn in the same way as 2D porn and still have an immersive experience whilst not wanting to fully immerse ourselves into the medium.
The whole AR concept isn't designed to be a passive experience. The idiom 'You can't have your cake and eat it' comes to mind.
Similar to what @Vrsumo2017 said earlier, sometimes I jam my Fleshlight in-between the two seated parts of a couch, then put a cushion over it whilst watching a doggy scene and simulate the doggy position. I probably look ridiculous and I don't know what I would do if someone caught me doing it lol but it's some of the best jerks I have ever had and I am normally out of breath after I have finished.