Superbat

YIn my opinion (just my opinion) I think Superman 

cracks knuckles. ok hear me out.
i think with bruce/clark, bruce powerbottoms and clark service tops. we know the richest man in the world Needs to have control but by god if he isnt enjoying actually getting to like. rest and feel good and destress. and clark farmboy kent just looooooves to feel useful it makes him feel so good to make his man feel good.
but HEAR ME OUT. its a whole diff story with batman/superman--i think bruce would absolutely DIE to have literally the strongest most invincible man on earth on his knees for him. and i think clark is just dying to let someone take the reins when he's on the job. he's got too much shit on his plate 24/7 he needs someone to sub for sooooo bad lmfao batman domtop and superman sub bottom
that is all to say theyre both switches LOL i love their dynamic so much