What are E-Cigs and why are people so crazy about them?

I should start by clarifying what E-Cigs actually are. There are two main types of E-Cigs on the market, and the differences are pretty basic. People like different things, and shop different places, so you have likely noticed two different E-Cig product lines when out with your friends. When electronic cigarettes first came onto the market, they looked a whole …