Scientists and researchers have long sought to understand why people cry when experiencing joy or happiness. 【小题1】 Over the decades, scientists and researchers have thought up theories to explain why happy crying occurs.

【小题2】An early theory suggested that happy crying happened because people bottled up their feelings. This meant that people who cried when experiencing something joyous had feelings of sadness they hadn’t addressed. Many researchers have contradicted the theory over the years, but it appears to be one of the earliest attempts to understand why we cry when we are happy.

Crying may regulate your body. Tears contain enzymes, lipids and metabolites. But emotional tears might also include other proteins and hormones. It is hypothesized that release of stress hormones may help control the body’s physical and emotional homeostasis(动态平衡).【小题3】

It fosters vulnerability and social connection. Crying in any situation could also be our way of showing vulnerability as human beings.【小题4】This happens when we cry because of a happy or sad event. Scientists believe that crying is a way of establishing a social connection with other people.

You feel powerless over your emotions. Yet other scientists suggest that all types of crying are results of perceived feelings of frustration, helplessness, and surrender. Crying almost feels unavoidable when people experience a strong emotion, whether it’s joy, frustration, or anger.

Though you might not always allow your tears free fall, you often feel them coming on. Some research suggests that this is because crying can help you manage strong emotions.【小题5】

Therefore, while you might be experiencing a happy or joyous occasion, you might find the emotion overwhelming. Crying helps you release some of this emotion.