You should check out the show called Black Mirror. There's an episode that has a feature similar to virtual porn where people have implant that allow them to record their visual and audible memory and play it back at any point in time. Even if that particular episode doesn't tickle your fancy, the entire series is an awesome twilight zone-esque dystopian future/present with some interesting critiques about the capabilities of our tech!
RE: Virtual porn??? Things are about to get weird…