Nirvana’s opening salvo in its assault on mainstream rock, “Smells Like Teen Spirit,” did more than just wash away any musical relevance of bands like Poison and Winger, but it also laid waste to the sexism that fueled so much hair metal and other dude-centric hard rock. The first human faces you see in the video for “Smells Like Teen Spirit” belong not to the band members, but to a group of heavily tattooed women dressed like anarchist cheerleaders, a swift but brutal rebuttal to all the images of acceptable femininity that your average suburban teenager lived with at the time. Forget the hair metal groupies or the bubbly beauty queen cheerleaders. For girls watching this video, it was a revelation: You could instead choose to be a badass.