I started writing this guide in an attempt to catch everything worth catching. I ended up running into more styles than I could really hope to capture... But hopefully, this is good enough.
The word "boot" has often times been oversimplified to refer particularly to casual boots. This oversimplification in turn feeds the misunderstanding that all boots are casual. I'm here to remind you that they aren't.
Quick and dirty: a suit is a set of matching garments, consisting of a jacket, pants (or a skirt, or something), and optionally, a vest/waistcoat. They have to match.
A loafer is essentially a slip-on shoe with a moccasin-like upper (top + sides), a separate, rigid sole (leather or, in some cases, rubber), and a heel. But there's a whole lot more to it than that.