Don’t judge a Skeletor by the skull

Never judge a skeleton by its skull. You know that old saying.
Or was it band by the cover?...

Anyway, being loving and emphatic to animals tells a lot about the human's true nature. I mean, reveals your true skeletal nature. Wait. Undead uh, nature?...

ps. or was it book by the letters? Cat by its hair? Ahh, by Castle Greyskull! Forget it.