[quote=@Codify]
<Snipped quote by Server>

Oh. Well, my main dads are friends with this guy who can use one of them really well, and he taught them and his other friends how to use it. And then Miles' wife, Cream, is like... absurdly good with all the others that aren't non-carbon exclusive, so she taught the bio-mes the rest. 
[/quote]

There are metals that contain carbon too.