The implication is typically that they’re popular with guys. ie, they’re physically attractive to the opposite sex, they are sex symbols. That’s really what it’s all about. It’s not a two-way label, it doesn’t mean the attraction is necessarily returned. Although it is often assumed and commonly leads to people accusing them of being “sluts” despite not being justified. But on its own it just means that they are the object of desire of many boys: they probably have many suitors, lots of people want to ask them to the dance, etc. That is the way they are considered “popular”.

Florida is basically the unofficial US Capitol now, so it would be confusing and ambiguous to have it associated with the traditional forms of unexpected insanity. Now it’s going to be an entirely new kind of unexpected insanity, so Ohio has been selected to represent the old kind of unexpected insanity that Florida used to represent.

The fuse is actually in the UK plug (the big brick-like thing with the wire on it), not the socket. But yes, it’s a thing, and most of the rest of the world considers it overkill. Also a lot of cheap junky equipment (ironically the stuff where you’d most want the fuse) omits the fuse in the plug, go figure.