Why do you have to close your eyes when kissing?

If a person kisses you with his eyes closed, then he must love you very much. I don't know where I heard it, which made me never close my eyes again when I kissed, because I wanted to see if he really loved me. Why do people always close their eyes when kissing? This seemingly boring question was first put forward by scientists in Singapore. Last year, Russian scientists expressed their own unique views on this issue. They believe that there are three main reasons for closing their eyes when kissing: first, the two sides close their eyes in order to kiss more intently and devote themselves to enjoying the excitement and sweetness of the kiss; Second, in order to avoid seeing the bad expressions or some unpleasant facial features that may appear on each other's faces during such close contact. According to a professor from the National Institute of Education of Nanyang Technological University, the kissing process will cause some sensory load, which can be naturally reduced by closing your eyes. From the visual theory, if you close your eyes when kissing, both sides will only see "fuzzy" non-three-dimensional facial features, which may not cause unpleasant feelings for both sides. Therefore, in order to avoid this unpleasant feeling, people instinctively close their eyes when kissing. Third, it is shyness. Maybe this reason doesn't apply to everyone. Scientists said: Some people think that people kiss their eyes to avoid embarrassing or embarrassing each other, and they can fully experience the wonderful feeling of intimate contact and love. In short, simply speaking, in the process of kissing, both sides close their eyes in order to enjoy the sweetness of love without any interference from internal and external factors.