they look good and the like to tease and get attention from men that they are attracted to. There is a darker side to it as well they have been taught that , their value is in their apeal to men and unfortunatly that offten plays a part.
How about... proud of the work they've done to have a nice body? Do you complain if you see a shirtless pic of a guy who's spent a lot of time in the gym?
It makes them happy.