 All of North Korea's three leaders—Kim Jong-un, his father Kim Jong-il and grandfather Kim Il-sung; have been smokers.Kim Jong-il has called smokers one of the "three main fools of the 21st century", along with people who do not understand music or computers.The current leader Kim Jong-un is often seen smoking in public, including in university classrooms, subway carriages, and in the presence of his pregnant wife Ri Sol-ju, facts that "might make the life of the North Korean health educators more complicated."