I know what you like, I am your prescription
I'm your physician, I'm your addiction

from Jay-Z – I Know Lyrics on Rap Genius

Jay is establishing his dominance in this relationship by depicting women as weaker and dependent therefore portraying the main female subject as an addict of the male gender. BAM!

This is a continuing reference to the fact that she is addicted. He is her medicine and healer, but also her addiction.

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