Snorting = good; chewing? not necessarily

One other really important nugget from this week's lesson was that the snorting sound is a good, relaxed sound, and I should reward him. I always thought he was just blowing his nose.
The chewing may not be relaxed - it might be evasive, so I shouldn't reward it.
Who knew? (Please don't post a comment saying everyone on the planet knew but me.)