He chew chew chooses obliviousness

 Terry eats lunch with earbuds in.  He can’t hear the disgusting noises his mouth makes as he chews with it hanging open.  He laughs and breathes heavily without using his nose.  It’s a wonder he doesn’t end up with his lunch all over his shirt.  You would think hearing your chewing in your head would make you do it more quietly, but it seems to make him oblivious to his own symphony of bad manners.  

You should shouldn’t hear him eat cereal.