I see these lyrics as spoken from the viewpoint of heroin, trying to coax a user into using it again. Bear with me: The user "gets what he wants", obviously, when using the drug. The heroin, when injected, "floats downstream" though his veins. Dead veins are probably visible under his "translucent skin". "The shape of your eyes", diluted pupils?, "the shade of your eyes", redness of the eyes? Maybe that's exclusive to marijuana, don't quote me. I'm tired.
I see these lyrics as spoken from the viewpoint of heroin, trying to coax a user into using it again. Bear with me: The user "gets what he wants", obviously, when using the drug. The heroin, when injected, "floats downstream" though his veins. Dead veins are probably visible under his "translucent skin". "The shape of your eyes", diluted pupils?, "the shade of your eyes", redness of the eyes? Maybe that's exclusive to marijuana, don't quote me. I'm tired.