When 22-year-old college student Abby Webster watches ASMR to fall asleep, she takes special precautions. "I have a roommate, and I angle my laptop away because I'm like, 'I don't want anyone to see ...

What do the sounds of whispered affirmations, page-turning, and tapping fingernails have in common? What about the sight of slow hand movements, soap being gently cut to pieces, and hair being brushed ...