Apologies for late replies, been a bit busy
First of all, "spectrophilia" is now one of my favorite words, and if you're not going to pick up on that, I will at some point. Gavin's getting some great treatment in your threads: even in the throes of passion, he recognizes that this isn't normal. Maybe he could go investigate this phenomenon himself and then run into Dr. Jefferson, at which point she demonstrates the effects it's having on them.
Hey, it's yours, have fun with it! I look forward to that storyline of you write it

I used to be a psychology major, so I have a mental closet full of random terminology, and the units I did on sexual paraphilias were... diverse, let's say. Stick "-philia" at the end of any root word and you'll have a probably real psychological state. Obviously some are more famous and those are the destructive ones (pedophilia, necrophilia), but there's ghosts, armpits, licking eyeballs (not kidding) -- they exist too in the literature.
I guess I empathize with Gavin's character I bit! He reminds me of myself in high school, hence my characterization of him in my first threads -- stubbornly shy, but full of passion -- which is definitely reflected in duskford's main thread as well when he finally hooks up with Chloe. And yeah, in my new ones, he does realize something's wrong, but his inner passionate self takes over -- that and I'm a fan of Gavin/Victoria, so he likes her

I do like your idea of Gavin and Dr. Jefferson investigating the erotophilia's source, I'm gonna have to shamelessly steal that!
Right now, I have something special planned for Heather/Kurt and its effects on them. They're more aware of it than anyone else right now, and that will reflect their behavior toward each other regarding it.
I also like the idea of Zack/Taylor as a mentoring relationship. Since Taylor is so similar-looking to Heather, though, would Zack realize he was "practicing" on his sister? Maybe he'd think the cheerleader was showing him how it's done! Or maybe he keeps going back and forth, thinking Taylor and Heather are taking turns!
Haha, nice idea! Reminds me a bit like Vain's thread where Heather mimics Taylor mid-coitus with Zack. Or maybe Zack happily sneaks up on Taylor, thinking it's Heather, only to discover the truth when it's too late! (Well, that's a bit cliched, but always fun. Oh incest erotica tropes.)