2) Am I supposed to take off my underwear when I get a massage?
Many people prefer to keep their panties or briefs on during a massage, while others prefer to be completely nude. It's up to you.
If your problem areas are your lower back, hips, buttocks, or groin, tight-fitting underwear can sometimes get in the way of massage work, but a thong for women or briefs for men should do the trick.
In North America, if you do remove your underwear, licensed massage therapists must ensure that you are always properly covered by a sheet or towel. Only the area being massaged will be uncovered.