I think that the entire intro is just tongue-in-cheek. "Snakes and hats go together like baked-beans and grapes: it's rare to find one without the other." - that doesn't make any sense, either. Whoever wrote it either has a dead-pan sense of humor, or was drunk.

the whole intro just doesnt really make sense so.....like baked beans and grapes wth? also i think they are just kinda making fun of adam and eve and that whole story

Err...do fictional stories need to be scientifically accurate though? It is after all just that. . . .a made up story written by humans.

it was a joke on the story of creation. "Eve was convinced by a hat-wearing snake" ..