"ASMR is not as odd as it sounds," said Burnie Burns, co-founder and chief creative officer of production company Rooster Teeth. "In the 90s we had CDs and audio tapes of rain forest sounds that many people used for relaxation purposes -- there just wasn't a fancy term to classify that media. Since online video has become a phenomenon, now we have a whole new generation of those kinds of ephemeral experiences created by people all over the world."

The areas that typically work together weren’t firing together as much. Instead, other areas of the brain were getting more involved than usual—areas related to a visual network, for instance. These differences suggest “that instead of having distinct brain networks the way you or I would, there was more of a blending of these networks,” says Smith, who studies the neuroscience of emotion. “It does make intuitive sense that a condition associated with atypical sensory association and atypical emotional association would have different wiring in the brain.”
I've been aware of the ASMR feeling since about always, but I really thought it was something everyone got. As common as breathing, so it never occurred to me to speak about it until recently when I gave my sister a few links that made me feel these triggers and she felt nothing or was even greatly annoyed... then I came across reading about it and realized, not all people get it. (They're totally missing it, I like it a lot!)

It’s not really a physical feeling if that makes sense, but there is a powerful reaction to the sounds nonetheless, to the point where I’m instinctively arching my neck, and a feeling does wash over you that is truly unique, almost addictive. What I don’t fully understand is why my mind chose just now to react when I haven’t had anything close to an ASMR experience before. I’d say that I’ve just found the right trigger, but I’m even reacting to videos that did nothing for me in the past. Like something clicked in my head recently.
While many colloquial and formal terms used and proposed between 2007 and 2010 included reference to orgasm, there was during that time a significant majority objection to its use among those active in online discussions, many of whom have continued to persist in differentiating the euphoric and relaxing nature of ASMR from sexual arousal.[citation needed] However, by 2015, a division had occurred within the ASMR community over the subject of sexual arousal, with some creating videos categorized as ASMRotica (ASMR erotica), which are deliberately designed to be sexually stimulating.[8][9]