http://www.heretical.com/miscella/bpaedo.html
It is both, people can be attracted to children, just as they can be attracted to foxes and fatties. It turns into an obsession and can converge with other feelings that people have for children like cuteness. Men are naturally attracted to post pubescant women aged between 16 and 35 and any other perversions are "nurtured" cross overs. Though there is a chance that a person may be more likely to be attracted to children or furries etc..