Why has everyone gone shy to show legs?

I can't figure out why has in this last decade everyone gone leg shy. In the gym no one wears Leotards or workout breifs anymore. I see in sports like basket ball the girls have completely covered their legs. Back in my high school cheerleading days I would wear a very short skirt with a workout breif/bikinibottom. I really liked that...I got to show off. Many other places as well for example when i watch a circus on TV I see leotards have been substituted for Unitards. In danceing shows again they wear more. This botheres me because I find that hideing ones body is a step backwards and not front wards. I wonder if the next generation will go back to the 80's style of showing legs again.