Yeah I read that. It doesn't mean he knows more about furniture than most. I agree with rogual, it looks nonsensical.
I interpreted as saying he knows a lot about different kinds of ideas / memories / things in the head.
Look up the definition of metaphor in a dictionary. Hint: nothing here is referring to furniture.
Why are you being mean? Honest question. Why? What's the point?
Furthermore, and more importantly, why are you defending slop?
Look up the definition of kindness in a dictionary sometime.
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