There are those who can't stand the sound of people smacking their lips when they chew, then there are the 100,000 or so who follow this "ASMR" specialist on Youtube.com to trigger their ASMR.
"ASMR" is defined as a low-grade tingling (euphoria) sensation that starts on the scalp and travels down your spine.
"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.
Listen to the annoying lip smacking below."
Spotted on @IndustryOnBlastx