Why do people like to close their eyes when kissing?

Psychologically speaking, love is strongly exclusive, that is, love is always for two people, which is what we call the world of two people. Kissing happens to be one of the most intimate actions between people, because it exceeds the safe distance of 20 cm that people can bear psychologically. At this time, it is popular to say that two people are open to each other, but they are not enjoying sensory satisfaction, but fully enjoying psychological enrichment, security and psychological feelings.