Smiling Culture

Should we have a reason, to smile at people? Should we have a reason or two, to show the human spirit? When our eyes meet, we smile spontaneously, and then move on, to do our works. Nothing attached. When our eyes meet, and I smile, The other mouth zipped, but the eyes opened wide. 'He has made a cruel thing to me, by not smiling back at me'. 'She has made such an act, smiling, by not keeping the stone face'. Is smiling an expression, to invite the people to bed? Is this friendly gesture, an expression of corrupted mind? We smile at everyone, male and female young and old, educated and uneducated, rich and poor, healthy and healthy. at any time, but we would not smile, the second time.