Why does Superman wears his underwear outside his pants?

if there is no underwear of a different colour, he would be wearing a pure single coloured long john like suit, wouldn't that be more gross?

Layering clothing creates warmth...useful when flying around really high and really fast.

Because if he put them on his head nobody would recognize him.

Hey it works with the glasses.

it was originally a mistake when in the comics. But everyone loved it so they kept it up.

he signed a deal with Hanes.

because all the cool kids are doing it

So that he doesn't get panty lines.

better support. roflmao

lol...who knows, another weirdo

because batman and robin do it