This is something I've only just discovered as a thing in the last year or so, but obviously I've felt it all my life and not known what it was. A few things can trigger my ASMR, but a couple in particular are high notes in my favourite songs and other satisfying sounds and textures. I watched Frozen 2 for the first time this weekend and Into The Unknown sung by Idina Menzel really hit me. I absolutely loved it and it gave me the tingles. Another one is The Wizard And I sung by Cynthia Erivo in Wicked.
On reading about ASMR I've discovered that it's really good for regulating the nervous system, so I'll be seeking out self soothing noises and textures next time I'm struggling.
What gives you ASMR?