>I tried to listen to some ASMR triggers, and I got the same physical reaction and feelings of discomfort I get from fingernails scratching on a blackboard or hearing someone clean their teeth.

Glad to hear I'm not alone. My wife and I listened to the This American Life program on ASMR and I couldn't even stand the few short snippets in the program. The whispery sound of quiet talking where you can hear the speaker's tongue flapping around in their mouth makes me want to pull my teeth out with pliers.