Newswise — Folding towels. Peeling fruit. Scratching microphones. Hearing sweet nothings whispered in your ear.

Those are the underpinnings of Autonomous Sensory Meridian Response, currently the biggest trend you've never heard of.

Coined in 2010, ASMR is a relaxing, often sedative sensation that begins on the scalp and moves down the body. It has been called "brain massage.” Hundreds of videos on YouTube are meant to stimulate the feeling — bars of soap being sliced into shreds, a woman playing with her hair, someone slowly and precisely unboxing an iPhone.

If you’re older than most “tingleheads,” PBS painting instructor Bob Ross — he of happy-clouds and pretty-little-trees fame — is ASMR from head to toe.

It’s going mainstream. Celebrities have recorded ASMR videosKentucky Fried Chicken has an ASMR-themed ad. (Asked about it, KFC executive Kevin Hochman told The Washington Post, "There's a lot of comfort that's associated with ASMR, and that's what our food delivers.")

Adherents say it helps them sleep and deal with stress. Some report feeling better after watching ASMR videos.

Researchers haven’t delved into how or why ASMR works (and the National Science Foundation is not exactly throwing money at it), but psychologists do have some ideas.

Ryan Stoll, a psychology researcher at Arizona State University, is available to discuss what ASMR videos are and why they work for some people.