Let me hit a few erroneous notions thrown out there.
1. You don't drink the liquid nicotine because it's fukking stupid.....and nicotine in that form is poisonous. Nicotine is a naturally occurring substance tho...not chemically created. You could eat a few apple seeds and you would be ingesting cyanide in a effectual amount. Nicotine is found in tobacco, potato, tea and tomatoes...etc. You already a nic head nikka..so sit down.
2. It's proven in many studies and experiments that vaping is exponentially less harmful than smoking. The devices and process is derived from nicotine inhalers which were used in hospitals. One of the four ingredients used in the e-liquid itself is medical grade: Water, Nicotine, PG (propylene glycol) or VG (vegetable glycerin) and flavoring. All of which evaporates when heated.
3. Second hand vaping is a myth. The half-life of the only mildly harmful part of this is "nicotine" is .3 seconds in a controlled atmosphere/ air. Shotgunning a stranger is frowned upon tho.
4. shyt aint complicated. Read or view videos. It's not pick up and play...but it's not calculus either. If you're gonna stick to something and commit...it should be this. If you are a smoker. There are liquids out there that will fill that void, hit like a cigarette, and kill your cravings.
This ecig/vape movement is here doggies. The tobacco companies are mad...yeah they mad

....but fuk em anyway. Its a beautiful grassroots type wave too.....and lucrative if you resale/or are a juice chef.