Pain is an emotion. It is not a sense like sight or hearing. It is the opposite of pleasure. Through the years we have used the word pain to describe our lives. We say: he is a real pain in the neck, or it pains me to tell you this or we might refer to a specific type of pain like a broken heart. These metaphors are more than a matter of speech. It describes the relationship that exists between the mind and the body especially as it relates to pain.