Zerophilia stories

A bunch of hot stories, both original and fanfics of other stuff, but with plots based on the fictional condition of Zerophilia where a person switches genders whenever they get aroused. It's an old movie from B movie from the early 2000's, and I thought it would be a interesting idea to see what it would be like for different characters and spinoffs to have the condition, including different shows and movies. Here, we all get to see that happen. All I know is that there are going to be some pretty good stuff cooking in here.

• In case you don't know how Zerophilia works, I'll explain the details here:
• Basically the condition activates after someone has sex for the first time. From then on, the person who is called a Z starts to change into the opposite gender whenever they get aroused.
• A full transformation is triggered when they orgasm and it's the same when it comes to changing back.
• When two Z's, one male and one female, have sex, they end up stuck as the opposite gender of the one they had sex in. They loose their ability to change with arousal and the only way to change genders from then on is to have sex with another Z.

Now that you know the details, it should help give you ideas on where to take your stories. You can go in whatever direction you want to go in, just make sure it has something to do with main theme of Zerophilia. I'll of course be doing my own threads, but this for everyone to have fun with. Im sure there are many of you who have a ton of kinks that Zerophilia can spice up.