"Superhero Joke" joke

Q: Where is Spiderman's home page?
A: On the world wide web.
Q: Why is Superman stupid?
A: Because he wears his underwear over his pants.
Q: Why is Batman more stupid?
A: Because he wears his underwear over his pants and puts on a belt over his underwear.
Q: Why is Robin even more stupid?
A: Because he followed what batman did.
Q: Why is Wonder Woman stupid?
A: Because she wears a belt on her head.
Q: Why is Spiderman the most stupid superhero of them all?
A: Because he wears his underwear over his head.