This is something I've always found strange in myself, and that I noticed one day in school:
It was a little after halloween and we were at our desks doing some kind of quiet work... reading or a test, I can't remember... Either way, I stopped doing what I was doing, and just sort of sat there, completely dazed... there was a noise: someone was very quietly eating chips in a very quiet classroom.
It was putting me in a trance... I couldn't read, my mind went completely blank... even my breathing felt shallow! It's like I didn't want to disturb the quiet little noise... just wanted to listen and stare into space...
Anyway, skip to present day: my cat Ozzy has sinus problems and breathes and purrs very loudly, and when she licks herself, there are little snorts thrown into the mix. If she starts to do that when everything is quiet, it has that same "hypnotic" effect on me...
I know, it's WEIRD.
Someone eating all gross with their mouth open and slurping and being generally LOUD about it, well, THAT's a different story altogether! That just sicks me out...