According to the author, there is nothing inherently distasteful about spit. Many people tend to react negatively to the thought of drinking spit because the meaning we attach with the word spit is negative.
Step-by-step explanation:
People react to spit negatively because they consider it to be something dirty and useless. People's thoughts are governed by what they think or consider an object to be. If an objective is viewed as negative or not in good taste, the thoughts attached with the object would also be negative.
Spit otherwise is not distasteful and in fact is important for the digestive system to function in the right manner. However, for most people spit is a dirty think which they consider useless.