14. Why do different people respond differently to being touched in the same way?

No one really knows. “Personal preference” is about as close as we can come to an answer, and that’s not much of an answer.
Your observation is however, accurate: Whatever the kind of touch, there are people who love it, people who hate it, and people who don’t understand all the fuss one way or the other. Examples of touch that some people love and others hate include being scratched by long fingernails; being deeply massaged; and having the toes licked, the ears kissed, the breasts bitten, and the hair pulled.
Each person’s preferences also vary according to such factors as mental state, degree of arousal, and time of month. For example, as our pain threshold increases during sexual excitement, the kind of touch we enjoy changes.
Since people are not interchangeable in their preferences, and since even individuals’ preferences change, communication ism a key factor in sexual satisfaction.