My brain obviously went to a Stephen/Stephen place, so if you want more of that, here's a place to get started...(List covers everything I could find on the newskink delicious and in my bookmarks, plus the few things I've written.)

Real!Stephen/"Stephen":
Selfcest, oh yeah
Method

"Stephen"/Chuck Noblet
Five Times Chuck And Stephen Had Sex (Mostly With Each Other)
The Pundit And The Pauper

"Stephen"/AU versions of "Stephen"
Screwing Yourself (with Stephanos, from Fake News Rumble)
Too Far (with the Formidable Opponent)
Mirror, Mirror (with liberal!Stephen)
Several things in the comics section here (with liberal!Stephen)

I've also done some art that fits the bill, although it's all pretty old by this point...I could take prompts?