Cars after the 80s: my body panel work is rounded to provide aerodynamic curves that reduce air resistance so you can go fast and save gas. It takes high manufacturing techniques not available to other producers to ensure uniform shape.

Cars after the 00s: the bently rear boot is hand beaten by polish slaves into a shape that the worlds best engineering software cannot replicate because we can, looks like ass btw, in the future we will probably divide it into 2 to simulate a real pair of buttcheeks