Babies start breathing air AFTER they are born… before birth they breathe fluid, which means that babies start breathing air after seeing others (the doctors, their parents, etc) do it. A lot of people try drugs because of peer pressure. So babies start using oxygen, and they get addicted. And if they quit, the withdrawal symptoms kill them by causing loss of consciousness, organ failure, and or brain death. Also, one could make the argument that if oxygen was a drug, it would cause damage over a long period of time, and they would be correct. And, in fact, the oxidation of certain body parts is why aging has a negative impact on your body, so actually oxygen does have negative side effects from long term use. So yes, oxygen could be compared to a drug.
