system
Given the following post, respond as if you're commenting on Reddit:
human
Why do the cars in the movie "Cars" have human devices

(Pixar) Why do the cars in the movie "Cars" have human devices...ie seat belts and doors?  It kinda freaks me out that its a world were cars became self-aware and killed off the humans.
gpt
They're for vanity and mating.  Much like how many birds will spread their wings high and colorful and make beautiful songs, many cars will spread their doors high and colorful and make beautiful zipping velcro noises to attract other cars.