Oh it did exist. There is porn from the 80's of casting couch calls. Hell woodman casting was around doing porn star casting videos WAY before internet times. The internet just gave it a place to sell to more people.
Shit..there is a series from the 1960's called "Fresh and Tight" (or something like that) of specifically that type of porn video.
-We don't control what happens to us in life, but we control how we respond to what happens in life.
-Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times. -G. Michael Hopf
Disclaimer: Post made by me are of my own creation. A delusional mind relayed in text form.