Tonight, Marvel finally unleashes the climactic Avengers: Endgame upon the world. Spoiler alert: it’s really, really good. Endgame is the culmination of a story over a decade in the making, one that has irrevocably altered the cinematic landscape and created a passionate fanbase. And one thing those fans love to do more than almost anything is imagine their favorite Avengers having gay sex.

Fanfiction is the cornerstone of any fandom, and the Marvel Cinematic Universe is no different. On popular fanwork website Archive of Our Own (AO3), there are currently 269,849 works in the MCU tag, most of which center on queer relationships between male characters. These stories range from porny one-shots that take place between canon scenes to sprawling, novel-length (and quality) epics that set characters in alternate universes.

But who are the most popular pairings in Marvel slash fanfiction? In honor of Avengers: Endgame, I did some digging — and yes, I may have stopped to read a little porn during my research.