It depends on the situation you are in. If you are having a discussion with the person then no, it's not rude to ask what they do for a living and you can let them know what your occupation is as well. It's just curiosity and perhaps by getting answers from each other you may use each other's services in the future.
it is personal.
Yes
Yes, that question is personal.
If they want you to know, they would tell you.
No
To stay away from someone that is rude in your class, you can ask to switch seats with another student.
Masseuse.
You don't need to ask why. Just be gracious and thank them.
Yes, of course you can. [although some ladies may think it rude to ask]
You may ask twice before it is considered rude.
say:This is a very rude and personal question.I would really appreciate if you didnt ask me such quetsions.
1. Be professional, stick to business and don't respond or make any comments about rudeness or personal things. 2. Keep the contact as brief as possible. 3. If the behavior is very rude or more than rude, ask for assistance - get someone who will just stand there and witness the interaction of you and your customer. This will usually stop the rude behavior, and if it doesn't at least your witness will be able to report that you were professional and didn't cause the rude behavior. 4. There is no rule that you have to accept rude behavior. If the behaviour is sufficiently rude (especially if your assistant can verify that the behavior is rude) you should ask for assistance of someone who has the power to ask the customer to leave.