It's a hot and humid day, like there's a thick blanket of air sitting on top of Seoul, when I visit the city's bustling Namdaemun market. The place has everything from live eels to military surplus gear, and I go to a corner with rows and rows of electric fans.
Kim Yong Ho has run an electronics shop here for four decades. His grandchildren are running around. And he says he would be very careful about letting them fall asleep in a room with an electric fan sitting next to them on a desk or the floor.
"I would turn the timer on and make sure the winds were blowing very gently," he says.