Why do girls like to take selfies in the back seat or passenger seat of a car?

I am a photographer. In my opinion, from a photographic point of view, the front and side windows are just triangular lights. The front light ratio is strong, the scattering area is large, and the light intensity on both sides (always sitting on one side of the seat) is similar to the basic light distribution method of portrait photography, which is called "three-point light distribution method". This method has a strong three-dimensional effect, and it will be much better in general. Even at night, due to top-down indoor lighting, it is easy to shape the outline, and diffuse reflection will also cause a good feeling to the skin. If it looks good, it will naturally be willing to shoot. Moreover, the relatively closed space brings a sense of security, and the expression can be the most natural, which is very important for non-professional models. They can make any expression without restriction without worrying about passers-by. So there are more selfies in the car.