Because superhero’s are different and god-like in a young child’s eyes (and for those adults! :D) You don’t want a superhero to look like Joe Smith down the road, you want him to look different and fantastic! and I can tell ya that unless Joe Smith is mildly “touched in the head” he won’t be sporting those sexy tights the likes of Batman and Superman are sporting! And I can’t deny it looks incredible! The capes, the utility belts, the gadgets and gismos, the strenth, flying, super strength and amazing powers: it all just looks better in those yummy tights! – LB
Note: Batman is my all time fav!