At some point, James probably asked Sirius to teach him how to dance, and Sirius did. Then James went and used his new skills to seduce Sirius' little brother.
Potter ⭐
Just thinking about Sirius and Remus bro-hug each other when they meet in the shrieking shack for the first time after Sirius went to Azkaban, then almost bro-kissed in a totally platonic, non-gay way.
Sirius is the type of person who randomly chills on the kitchen table just because he can.
*Remus covered in lipstick stains from Sirius, smiling like an idiot*
Remus: I love being gay
ITS TIME FRIENDOS!!! NO EXCUSES, JUST RESULTS!!
Remus: I think I-
Sirius: you think you love me?
Remus: that too, but I was going to say that I think your robes are on fire
Sirius: *blushing uncontrollably*
Sirius: he loves me!!!
Sirius is the kind of person who would write fanfics about himself and Remus before they got together
Regulus: Computer, how do I stop being in love with my brother’s best friend? Without anyone knowing, no drowning.
Regulus: 'Puter, do you hear me?
Remus: don’t start
Sirius: hearing "don’t start" gives me a thrill, honestly
Remus:
Sirius: makes me wanna start
Regulus "inescapable, l'm not even gonna try" Black and James "and if I get burned, at least we were electrified" Potter