"Metal is like an apple. Its all good except the core.."

Sorry but what? I am not sure if he means the music or like actual metal.

And this makes me feel really really dumb.

Shiver me timbers! Clearly this statement is meant to express the sweet and sugariness of heavy metal and it's supple and seductive sounds.

lol

... I'm with TheLastKnightmare, if only because saying so makes me look less dumb.