UGH I wanna write an alter-egos fic where Batman and Joker and Bruce and Jack get together. Only neither of them know the others' secret identity. Which means, Bruce is cheating on Jack as Batman with Joker. And Joker is cheating on Batman as Jack with Bruce.

They're both lying to each other, trying to fool each other and hide who they 'really' are... then sneaking out at night and fucking each other in costume, too sdlkfgjsdjfgsgd