Bobert, it's not the prostitute/client relationship where the victimization lies, but in the prostitute/pimp, prostitute/brothel, prostitute/drug dealer relationship. It's a victimless crime if and only if the prostitute is working of her own free will and receiving most of the money she takes in. If she gets $100 for a service and has to give $75 of it to her pimp, then she's a victim.