For there are only two worlds — your world, which is the 

real 

world, and other worlds, the fantasy. Worlds like this are 

worlds of the human imagination: their reality, or lack of 

reality, is not important. What is important is that they are 

there. These worlds provide an alternative. Provide an 

escape. Provide a threat. Provide a dream, and power, 

provide refuge, and pain. They give your world meaning. 

They do not exist; and thus they are all that matters...