What's the perfect drug of nine inch nails?

maybe its of loving a person so much that makes it so addictive to them, the song is not so material, like telling that they are addicts,, i think not.. its of addiction to perfect LOVE, a person they choose, a person so perfect to be their partner and the person they long they could posses... a person who could heal them, a person, who will be of so great importance and a beautiful reason to live...