That makes me think of that one SAW movie where jigsaw had an apprentice, but where you swap the death, pain, and fear aspects with pleasure, lust, and orgasms...
The serial ~ prankster in this case would give her a choice...
We can say one such girl wakes up in a chair thats rigged to a fucking machine, with attachents for her ass, vagina, and mouth... A TV suddenly turns on, and a grainy image of someone wearing a Pazzo mask appears on it... In a deep, rich voice, he murmurs...
"Lets play a game... I know you are afraid, and want to leave, and i bet you are willing to prostitute your body to do so, That door will open in 72 hours time, and for each orgasm you have, you can either have two hours shaved off, or 100$ will be added to a small box for you outside... what will you choose ?"
The restraints the release, and she sees that the room is filled with every manner of sex toy available, with many cameras watching her every movement...