Porn vs. Prostitutes

No this is not some sort of death match between prostitutes and porn "actors" which will be known .

I have had this conversation before but I was wondering what other people thought about it.

When you are making a pornographic movie you pay the actors to engage in sexual acts. You also pay prostitutes to engage in sexual acts. Assuming both the porn actors and prostitutes are willing participants in this scenario, which is not always the case, the only difference that I can see is that one of them is being filmed. I understand that prostitution has to do a lot with humantrafficking and all those terrible things, so disregarding that for this world of ideas. The addition of a camera has some how made it legal to have sex with someone you found on the street and payed for.

So here is the question:

If you were to pick up someone on the street and have them sign a film release, could you legally pay them for sex if you filmed it with the intent of selling it?

This also brings up the question of if you meet someone in a bar is it legal to have sex with them if you pay for their drinks? Are you somehow compensating them for their time?

I honestly do not know the answer, but am curious. It seems like if someone is going to make money off of it then it is more legal somehow. In no way am I saying that someone should do this if it is in fact illegal. If it is not illegal then have a blast!