[link to original on tumblr]
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Because "Work 'n' Play" was written by Ken Jones though, I don't know if that's the Beatles' influence on Jones or on the Zombies. That is, whether Jones wrote that part with joint harmonica and guitar or whether the Zombies arranged it like that based on what Jones gave them. Of course, it could just be a coincidence that it's similar to "Please Please Me," but I don't know of any other song that doubled harmonica and guitar.