It must feel pretty uncomfortable to have an oil sack in his stomach and a pipe coming all the way up to his mouth. But I suppose he would get used to it.
Btw, if you say: "I could care less about [something]", it means you still somewhat care about it, because there's room for caring less than what you presently do. That's why the expression is usually "I couldn't care less about [something]". It means you care so little about it that it'd be impossible to be any less interested in it.