Girls flashing at concerts was an American-only thing?
We've seen that young people today are far less exhibitionistic than during the wild times of the '60s through the '80s. In particular, flashing at a concert, streaking, and topless sunbathing are dead among young people. As for the first of those, here's an interesting quote I came across from the singer of Scorpions, Klaus Meine:
It is odd that in America that some of these [album] covers were a problem because in the 80’s when we would tour here we always had boobs flashed to us at the front of the stage. Nowhere else in the world, just here.
That's from the Wikipedia article for their album Lovedrive, but the citation goes nowhere. Supposedly it's from a 2010 interview. Notice from the tense that he speaks about this pattern of behavior as something that died in the '90s and 2000s. What's really cool is his statement that it only happened here. I'm sure he had plenty of experience touring the globe, so his perception must be true.
You always hear social liberals whining about how Puritanical our culture is -- those French are so liberated, they even go topless on the beach! Well we had that here, too, it's just that you had to go to rock concerts, particularly hard rock or heavy metal ones. But these complaining sophisticates would rather chew on rat poison than socialize or even be seen with metalheads, so they missed out on toplessness American-style.