Zack has fantasies, taboo ones. He watches a lot of porn about the types of things he would love to do in real life. One day he gets in trouble for leaving a taboo movie in the dvd player downstairs.
Even though he knew it wasn't his, Zack takes the blame. Rather than be upset, he's excited. If it wasn't his, there was only one other person it could belong to. Does she have fantasies too?