Winking Girl

When Frederick Spencer Chapman was training Chinese guerillas in Malaya to shoot rifles, he found that a large proportion of them were unable to close only one eye at a time.
• Africa
West African parents may wink to signal children to leave the room, especially when there is a guest, or another adult coming in. It is considered rude for children to stay in a room where adults or elders want to have a conversation, and so winking is used as a more discreet way to tell the children to leave the room. Parents also try not to embarrass themselves in front of guests, because their children do not understand immediately when it is time to leave the room.