Cheat on each other or anyone else (especially not if the cheating is portrayed as romantic).
Die tragically, violently or AT ALL.
To all the people in the notes going “but but tragedy is a valid form of…” Yeah, sorry, straights broke it with decades of nothing but tragedy for LGBT characters. This is a moratorium on all such tragedy films with tragic endings for at least the next 50-75 years at which point there will be a review to determine if mainstream media has EARNED it.