"Carbon monoxide from cigarettes causes oxygen debt"
California retailers can only get one from the state tax agency, plus any extra licenses your city or county requires
...which was later revealed in the sequel, where natural born smokers like him would be recognized as responsible parents, where their child has to be educated through the exposure to tobacco upon birth, and be sent to a school to be taught to correctly inhale tobacco from peers known as "friends", and any child resisting or refusing it on any ground would be bullied and ridiculed until they comply, as every child would develop a fully-fledged nicotine dependency, carrying the natural smoker's cycle
Based on current trends, the most disadvantaged communities will not be smoke-free until 2045, according to the report
Due to his knowledge of their unique talents and quirks, his pupils easily become some of the most talented in the shonen