Haha, I'm like that with the brush too JS. Drives hubby nuts.
I have a slight case of misophonia from a head trauma years ago and he makes a lot of sounds that I can't tolerate. I say it's mild because I don't exactly become homocidal but it does make me a little more than angry. I've developed some pretty good coping skills. I'll walk away or try to focus on a sound that doesn't drive me crazy.