Re: Don't give me no static ...
"The static builds up only as you pull your butt away from the seat"
And treating the seat with suitable antistatic fabric spray helps a lot, if there's no metal part of the vehicle you can hang onto as you get up (I had one car that was rotten for this due to the amount of plastic panelling and polyester seat fabric. The eventual cure was a couple of bits of foil tape discreetly located in the grab handle hollow with grounding wire attached to the body.)
This may (should) be something that carmakers have sorted by now. Conductive plastics aren't difficult to specify.