Your blood does not turn white when you shoot up heroin, that's incredibly silly.
Personally, I think those parts of the song are about love, oddly enough. That the singer loves someone else so much, that they can survive on just the bile and excrement of the other person. Milk is nourishment, shit is discarded waste. The singer loves the other person so much, that even that will sustain them. The rest of the song is mainly scraps of themes and ideas, I'm guessing. Kurt wrote songs in a haphazard manner, taking lines from various scraps he had written, and putting them together. He also enjoyed themes of bodily fluids and uncomfortable aspects of human biology (see Drain You, most of In Utero.)
Your blood does not turn white when you shoot up heroin, that's incredibly silly.
Personally, I think those parts of the song are about love, oddly enough. That the singer loves someone else so much, that they can survive on just the bile and excrement of the other person. Milk is nourishment, shit is discarded waste. The singer loves the other person so much, that even that will sustain them. The rest of the song is mainly scraps of themes and ideas, I'm guessing. Kurt wrote songs in a haphazard manner, taking lines from various scraps he had written, and putting them together. He also enjoyed themes of bodily fluids and uncomfortable aspects of human biology (see Drain You, most of In Utero.)