Disgust is a really hard feeling to explain. Surely you have things that disgust you. Unless you are specifically trying to eliminate feeling of disgust because it’s getting in the way of healthy living, I don’t think there’s much utility to trying to examine or explain the feeling. For example. I’m disgusted by mucous. Its a normal thing everyone has. I’m not sure exactly why it disgusts me. I don’t want to be undisgusted by it and the disgust I feel is in no way pathological.