I agree with Kate. I thought I was the only one with this problem. Then I found this website and it is amazing. But about your problem. I have the same problem except my dad is he one doing it. But I’ve tried asking my dad politely to stop smacking but he just gets mad and tells me the world doesn’t revolve around me. And that has nothing to do with it but I don’t think he understands how the noises he makes effects me. And I have thought about hurting him but I don’t want to have these thoughts. And when my dad is eating something and I’m around its like he does it louder than usual just to annoy me.