So if I pay a woman for sex with me it’s prostitution but if I pay her for sex with another guy it’s not prostitution?
Here’s a novel legal defense concept - Bill and Bob want to hire hookers, but don’t want to break any laws - so Bill hires a hooker to service Bob and Bob hires a hooker to service Bill, and they both film it - this somehow converts illegal prostitution into legal porn?
If Bill paid Bob and the woman to have sex with each other and he had sex with neither, then it works. If they buy hookers for each other, they are still buying hookers.