This is one of the most poetic entries I've encountered on Wikipedia:
"Autonomous sensory meridian response (ASMR) is an experience characterised by a static-like or tingling sensation on the skin that typically begins on the scalp and moves down the back of the neck and upper spine. It has been compared with auditory-tactile synesthesia. ASMR signifies the subjective experience of "low-grade euphoria" characterised by "a combination of positive feelings and a distinct static-like tingling sensation on the skin". It is most commonly triggered by specific acoustic, visual and digital media stimuli, and less commonly by intentional attentional control."
(https://en.wikipedia.org/wiki/Autonomous_sensory_meridian_response)
But what I found to be really interesting is the Response part: we just can't help it.
And so metaphysics and youtube ASMR optimized videos bloom.
(significantly edited/enhanced audio & video for better ASMR effect)