Why are younger women more superficial than older women?

Just go a question as to why women, mostly in the age range of 18-21, so superficial? Many of these women live at home or they have a roommate who is a close female friend. Their life consists of going to school and inviting guys over for parties and swimming. They want guys who take them out and buy them drinks, drive nice cars, and have a body of a fitness model.

As women get older, they still want a guy who is financially stable, but thier priorities when it comes to what they want in a man changes. They grow to understand that as men get older, maintaining the body of a fitness model or even having one is unrealistic and instead of having them over for parties they want to invite them over for a nice romantic dinner and a movie.