I hear mouth breathing all of the time: I hear it behind me in movie theaters, I hear it behind me in the checkout lines, I hear it on the answering machine (before my mum decides to leave a message two minutes later). Sometimes I hear it at night, when I'm alone, watching television. I'll think to myself "What
is that?"
I'll mute the sound...and sure, it's the cat, snoring with his mouth half-open.