The other day, I lost my cool when someone around me was handling a block of styrofoam. The noise was driving me nuts. I couldn't figure it out since the sound itself was not intrinsically harmful. It was not too loud, so there was no biological motive to protect my ears. Sure, music and sound in general can alter ones state, but what's with these "annoying" sounds? Why are they universally disliked, or at best tolerated?