Steady routines during this window support smoother adjustment overall
Some think this is 1-Q, and I can see why, except for one thing
As one review stated, "Nicotine is the addictive chemical in tobacco smoke, but its involvement in smoking-related harm (outside pregnancy) is very small, if any, compared to cigarette smoking." Another systematic review pointed out that nicotine can have a variety of potential health effects, from raising one's cardiovascular risk to causing birth defects in pregnant women
Plus, the whole smoke is just a combination of vaporous fumes, flavors, and certain aldehydes
So people saw it and grew from there
This demand has only grown over time