Hahahah, "Nigerian Parent".....this is very correct. In Nigeria, when our parent are reading the newspaper or any booklet, they are always on their glasses and they look like this 
But immediately a child walks up to them to talk to them, they do this 
So my question is "do they use their eyes to hear or they use their ears?".. Why do they remove their glasses??..... My parent does it a lot, what about yours??....lol