In some ways it’s not really about the chewing, Philippa Perry suggests
The question My wife’s eating habits drive me crazy. What can I do? We’ve been married for 30 years and we are a good team together. But she doesn’t seem able to eat with her mouth closed. Sitting beside me even now, she’s noisily crunching her way through a bunch of cheese crackers and an apple. When we’re out with friends, she’s by far the noisiest eater at the table.
I love her energy, strength and, if it’s not a mealtime, her presence, but we’re eating together more as we head into retirement and I find it difficult to stay in the room with her.