“It’s a physical sensation that begins in the scalp and extends through the body,” says the creator of popular ASMR videos. No time to get a stress-relieving massage in real life? For some people, ...

The barber turns on his trimmers. Click. Bzzzzzzzzz. He brings them closer and closer to my ears. He moves from one side of my head to the other. The gentle buzzing sound slowly pans from my left ear.