Ok, since you are defining prostitution as a business, I'll take it further.
There is a thug who uses a gun to rob people. One day he is walking down the street and someone points a gun at him and robs him. So, since he is a robber, he can't be the victim of a robbery.
Another guy is a counterfeiter. One day he sells something he owns, and someone gives him counterfeit money. But because he is a counterfeiter, he cannot be a victim of counterfeiting.
A guy steals cars and sells them cheap. One day his own car is stolen. But he can't be a victim of car theft because he steals cars.
A specious analogy, there was a crime committed here and that crime was robbery of a service just as the counterfeiter was robbed of a tangible.