Machine using the subject

so I was thinking an thought there would be nice to have a machine that moves the subject. This machine could work by having a pinch grip that you can place You could use it both to move a subject to fuck another subject, moving the dick or move the hole of the subject (pussy, ass or moth). This machine could work by having a piston and on that a pinch grip that you can place on the subject (not hard). You could place it on the back of there head, on there hips both front and back depending on  what you want to move (dick/pussy, moth or ass) . It would also be interesting if you had some more racks to go along side this machines like one where the subject kneeling down one were the subject is just staining straight or a T pose and lastly the X Rack one. Perhaps they could be on wheels or something to move them into place?