Messy mind

How complicated can the mind of a teenage girl be? All they ever care about are boys, partys or how to have fun with no sense of responsibility. Or do they? The human mind is incredible that can't be denied. Sometimes when thinking about normal daily things like "what am I gonna have for lunch?" my mind gets swept away a little deeper into the place where things we see as normal are being doubted, so it easily turns into a "isn't food just petrol for humans?" sometimes it can get really reasonable and smart while other times it is just pure stupidity. Regardless which one it is I will post it in hope my readers can give me an answer to that question.