Can anyone explain the ASMR to me? Or whether it's a thing?

As with a lot of weird shit, I stumbled upon reference to it on Reddit (www.reddit.com), which seems to have a collection of videos of people staring too closely into the camera, talk-whispering into binaural mics, and turning the audio balance such that you can clearly hear their horrible, moist mouth noises as they talk about nothing. It's everything I tend to find trying about human interaction.

Honestly, at first, I thought I'd found yet another weird fetish. Then, of course, I found the actual, not-safe-for-work-fetish section, linked from the normal page.