Brushing my teeth in front of people! I dont like people seeing me spit. I just can't do it. I had a partner force me to do it once, I hated it.... and I remember having to brush my teeth in bed when I had my appendix out, I asked the nurse to close the curtain thingo so I could brush without people watching lol.

Snorting when they have a cold... the sound of mucus ewwwwwwwwwwwwwwwwww

Eating with mouth open....