That really depends on how well you are acquainted with each other. If it is a total stranger, giving a professional massage, then partial coverage just seems more correct. Defining normal is more and more opinion-based, these days.
yes so they can massage ure sholders and back
Being undressed is not a requirement for getting a massage from a professional in any part of the world, as far as I know.
yes it is because it is really relaxing
No. It depends on the style, or modality, that is being applied. If it is one that requires oil as a medium, then the more disrobed you are, the more areas of your body will be available to be massaged. If you are getting an energy oriented massage that does not use oil , then you can keep all your cloths on and the therapist will massage you through your cloths.
Yes. It's common in spas. Make sure you have a towel around you though...
absolutely
Yes, it is common to become aroused during a massage. A massage provides stimulation, and stimulation can be arousing.
Many massage parlors offer a variety of services during a massage, such as a Swedish massage, a hot stone massage, and prenatal massages. During the massage itself, many parlors use relaxing music, soothing body lotions, and hot towels to relax the customer.
No. You are not 'naked' in any professional massage in the United States. In Swedish, and other Eastern-style massages, you disrobe (remove your clothing) and lay on a table covered with a sheet. The massage therapist then uncovers only the area that they are working on at the time. In Asian-style massages you keep all your cloths on and get massaged through them.
yes
DICK?
Its easy. Both of you get undressed. Get some massage oils. Start massaging. You'll see it go from there.