Jim Tremayne has been going to raves for more than two decades. It's part of his job as the editor of the country's top electronic dance music (EDM) magazine, DJ Times, but his work can get a bit uncomfortable.

"I feel like the creepy uncle sometimes when I'm working a show," said Tremayne, who often finds himself at concerts before "a gaggle of girls — I don't know, they're 19 years old or something, and they're wearing very little." Think: underwear. At most, "they might have some sort of fluffy legwear going on."

EDM festivals — or raves — have become events welcoming increasing nakedness as they've attained mainstream popularity. Women and men now routinely strip down to flashy and alarmingly skimpy outfits to attend festivals like Coachella, Electric Daisy, and Electric Zoo — a dramatic shift from how the rave scene began. "In the '90s there was sort of an asexual vibe to raverwear," Tremayne said. "The big, baggy stuff didn't really accentuate any hips or boobs or anything, whereas now it's so in your face."

EDM developed a cult following in the '80s. Since the music wasn't played on the radio, fans had to seek it out — and not just by going to record shops, but by using physical maps to navigate themselves to raves, where they could hear the music live in hidden locations that only the most dedicated fans would bother discovering. And they dressed more like they were going camping than to a Vegas pool party — flannels and enormous pants and polo shirts were cool. Baggy was THE rave look. But now that the genre has exploded in popularity, that's all changed. Spending the days or weeks leading up to EDM festivals bedazzling bras and DIY-ing bikini bottoms if you're a woman, or simply picking up a Speedo and oversized flag to wear as a cape if you're a man, is a normal part of the festival experience for millennials.

The result: Good luck finding anyone who showed up to the Calvin Harris set wearing Dad's flannel.

In the '90s, rave culture was "proudly and happily underground," Tremayne said. But that's all changed thanks to social media. At shows, "I'll notice all people are doing are taking pictures or Instagramming crazy things, and it's not necessarily about the music — it's about, 'Look at me, I'm justifying my existence by putting up my Facebook status,'" he continued. "It's about, 'Look at me and my friends going out, look how much fun we're having, look at what we're wearing, look at that crazy guy over there.'" Plugging EDM into social media turned its festivals into the biggest, most shareable party of our time — and kids are dressing to get noticed in the millions of bits of EDM festival content that positively floods social networks.