I've heard that the MO legislature has gone after massage parlors and "private" or "sensual" massages. I believe that in the state of MO, in order to advertise or give a "massage," you must be a licensed massage therapist (licensed by the state, much like a barber or hair stylist). It's actually illegal to give a "massage" if you're not licensed. To get around that, many "enterprising ladies" had taken the term "body rub" to do what you posted about. I've heard that the MO legislature actually passed a law classifing "body rubs" as massages, and are going after the "ladies" that way now.
Still, if a man and a woman (who is of age, of course) negotiate "time" together, then go to his or her place, if it's in the privacy of one of their homes, I can't possibly see how what they do is illegal, given the recent SCOTUS ruling... The best that could be hoped for might be a zoning violation, for conducting business in a residential area. But I don't even see how they could go after the lady for tax evasion, if both consider the fee a "gift." And if that's the case, then there couldn't even be a zoning violation... If it were, then birthday and anniversary parties would have to be outlawed.
Mark