I love coffee.
I choose caffeine because "neither" was not an option. I believe the method of ingestion is the key and I do not associate nicotine with burning a tobacco product nor caffeine with burning it. Compound verse compound in moderation is not a health concern.
The number of systems in which it causes malfunctions.
no reason
Caffeine can be found in much higher and common doses than nicotine. Simply, a cigarette is obvious (when you are smoking nicotine and tobacco) but with caffeine, things from tea and soda to coffee and energy drinks can be easily be taken in in higher doses or quantities.
caffeine effects the whole body and organs as nicotine doesnt
It smells funny!