There's no such thing as a "car girl." They do it for attention much like when they go on video chatting outlets and cam whore. Society teaches them to feel inadequate. Eventually, they do become insecure and this insecurity begins to dictate their every movement, action and judgement. Everything they do is for attention. They're constantly trying to compare themselves to men, to prove themselves, to gain recognition and to validate themselves. They post nude pictures because they want you to fawn over them and make them feel unique. Do you remember the woman who made the news for graduating US Army Ranger school? They had the same motivation for doing that.
Do I find it sad? For them. It's rather embarrassing and disappointing that their entire lives are going to be nothing more than a desperate scramble for validation from others. The thought people like this exist and are so insecure depress me.