User blog comment:Lightening McQueen/Cars theories/@comment-4352233-20130529135214

Have you ever seen the movie Robots? I think that in the Cars universe, baby cars and other vehicles are born in the same way (the parents purchase an assembly kit for the model they want their child to be, and put it together). To save time, some of the parts are pre-assembled at a factory. To determine the baby's gender, a special fluid is added to its engine. As the baby grows, bigger parts are added. The kit also comes with an assortment of paint so the parents can chooses what colour they what their baby to be.