Spider-Man and the Web of Nonintersecting Lines

Q: Why does Alain 'Spider-Man' Robert climb skyscrapers?

A: Because they are there.

Q: Why are they there?

A: Because we are here.

Q: Why are we here?

A: Don't ask Alain.

Q: Why?

A: Because he does not know.

Q: Why does he not know?

A: Because he is too busy climbing.