Stan Lee explains why making superheroes flawed made them beloved:Stan Lee spent 20 years writing conventional comic book scripts before he stumbled onto something that changed everything.He started giving his characters real, embarrassing, human problems."We tried to make our characters have feet of clay. Now, poor Spider-Man. I mean, okay, he's pretty good at catching bad guys, but he's apt to get an allergy attack while he's fighting. He worries about dandruff. He'll have an ingrown toenail.