What customs did the ancient Greeks have?

Greeks have elegant manners and speak Greek, and are also considered as the champion users of body language in the Mediterranean region. Their hands, bodies and faces are rarely static. Sometimes you can know the main content of their conversation from 50 meters away without even getting close. If you smile and nod, your right hand covers your heart, indicating "gratitude"; Others, such as waving, waving, are regarded as insulting and contemptuous actions in Greece; Staring at others for a long time, sneezing in public and wiping your nose with a handkerchief are also considered impolite.