I think mainly because of the incredible lengths they will go to in order to rationalise their fairytales.
To whit.....
http://scienceblogs.com/pharyngula/2012/...-plushies/
To whit.....
http://scienceblogs.com/pharyngula/2012/...-plushies/
If you're not supposed to ride faster than your guardian angel can fly then mine had better get a bloody SR-71.