I think it might be about him going to see a prostitute, especially the reference to being made last in line (as if she reserves a spot for him as a 'special customer'), and he's dealing with being addicted to this and to her, and probably also being in love with her or at least having feelings with her, but also hating their interaction and what it's doing to him, and how alone he feels given that this is the only way he can find 'intimacy'.
I think it might be about him going to see a prostitute, especially the reference to being made last in line (as if she reserves a spot for him as a 'special customer'), and he's dealing with being addicted to this and to her, and probably also being in love with her or at least having feelings with her, but also hating their interaction and what it's doing to him, and how alone he feels given that this is the only way he can find 'intimacy'.