Moe actually doesn't strictly apply to living beings. otaku have been known to call moe on trains, model guns, techs, etc, etc (like how Daru of Steins Gate call the LHC moe).
Also, "moe" is not to be mistaken with "moeru", though sometimes, they're interchangeable, I think. Literally, "moeru" is closer to "turn on" than "moe", because "moeru" literally means "on fire", but it's more commonly used in a shonen manga/anime where characters suddenly get in an exciting situation.
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