IIRC, porn can be prosecuted under obscenity statutes, but rarely is. I do seem to recall that under the Clinton DOJ there were exactly zero adult porn prosecutions, which emboldened the industry greatly.
More here:
http://www.straightdope.com/columns/read/2845/why-arent-porn-actors-charged-with-prostitution
There’s something about this story that won’t stand up.
How could a policeman “trick” a prostitute with a fake penis? It would be about like a prostitute disarming a policeman with a fake gun. Possible, though unlikely unless the policeman is a highly skilled specialist in fake penises.
A female prostitute is pretty much an expert in the subject matter, not easily fooled.
And the opposum running into the street at the climactic moment? Hardly credible.
I think we’ll soon find out there’d much more to this story.