Clothing gets in the way of the most pleasant sensation of total wholeness and connectedness of your body. This need of course is due to sexual immaturity as a culture and the fact so many confuse nudity and touch with sex. Normally only the areas being massaged will be uncovered. The recipient's only job is to relax as completely as possible. Talk for the most part is distracting.
Good massage requires concentration on the part of the therapist.
However, feel free to give feedback if any manipulation is uncomfortable or if you would like something done longer or differently. It's you who've come to this encounter to feel good. Let the therapist know if you are very ticklish. Strokes can be varied. Normally this is not a problem unless you are very ticklish.