>Very few things that are masked behave - Zorro, Batman, the Lone Ranger, ...

But the Superman is the bravest - nobody else dares to wear underwear on the outside!

Um... a related one:

Teacher: so, Peter, what do you want to become when you grow up?

P: Superman!

T: Alright, but... what would you be in real life?

P: Clark Kent, of course.