I'm wondering about the expression asking about someone's jobs. I know and use the expression, "What do you do for a living?" when I ask somebody's job. It's the most causal one, but I think there are various ones. Take for example: What are you? What is your job? How about those two expressions? Are they fine when I ask about their jobs? Is there any chance I am considered rude using "What are you?" Please help me! Thanks!^ ^