at the risk of sounding stupid, think for a minute about all the dreams that you have had that you can remember. how weird were they? and just think about the amount of dreams you must have had that you can't remember. well writing is the same thing for a lot of people they just dream when they are awake. stories are just that stories and fantasy is just a story that hasn't been written down. not only that i personally don't have a problem with fantasies be cause they can be any thing you want even if the never will come true. Because if they did then it wouldn't be a fantasy and more and you would need to come up with a new one.