do cigarettes have tobacco in them What is nicotine and other facts | PMI Cigarettes, Smokeless Tobacco, and Vapes:

These chemicals damage small passageways in the lungs which can cause difficulty breathing, shortness of breath, or permanent coughing

Ventilation removes heat

He is pictured on the cover of The Freewheelin' Bob Dylan arm-in-arm with then girlfriend Suze Rotolo who, Dylan writes, "had a smile that could light up a street full of people" [not literally, of course, that would be hazardous]

That really helped because I was 27 at the time, and there were a few others there who were older than that, so this gave us a licence to be goofy and crazy and horny

By smoking immediately after a feeding session rather than before, you give your body the maximum amount of time to process the nicotine before the next feeding