Why does Superman wear his underwear on the OUTSIDE of his tights?

Maybe way back in the day there was a malfunction inside one of the phone booths?Why does Superman wear his underwear on the OUTSIDE of his tights?its actually a small garment that is designed to keep the leggings and shirting help down, so they do not flutter. It is not a single suit. the shape is similar to the underwear but not for the same reason of keeping your Shart away from your pants.Why does Superman wear his underwear on the OUTSIDE of his tights?So people will know he doesn't wear underoos.Why does Superman wear his underwear on the OUTSIDE of his tights?BECAUSE HE CAN