Don't offer up the foot on the accelerator.
not sure how that can be a turn on. But I can' see it being a factor of him wanting to control something and getting excited over that. If you are older you have the responsibility of driving properly and sticking him in the back seat if he wants to do that kind of dangerous behaviour.
Tell him that is quite dangerous & you will not put up with this behavior. He really wants control over you it seems.