okay but now I'm just thinking about ways to make this work (including some stress sensors on the fabric to make pressing the boobs act like a joystick and placement of L3/R3 and triggers) and I think I came up with a valid design which I now feel compelled to make... I must make...
^ Step One: Ensure Girlfriend is into nipple clamps. (Optional) Step Two:https://makeymakey.com/
(I acually had a collection of more on-point projects and 3D-prints once, but turns out GitHub is a yankee firm and does not like people doing anything but bending over to LLM slop. Welp.