The woman with the hands of gold that gets the knots out of your aching back is called a "massage therapist," but for a long time the word masseuse was acceptable.
Many women who do massage professionally do not like the term masseuse but it is literally defined as a "female massager." The term has swinging sexy undertones, perhaps conjuring up images of flirty athletic women. While you may be lucky enough to get a massage therapist like this on your next spa visit, don't call her a masseuse. If it's a cute man, don't call him a masseur, either.