Pedophiles, unlike other men, show substantial sexual interest in prepubescent children. As far as we know—and many people have tried—these sexual interests are not modifiable by any method that’s been tried yet. So it appears like pedophilia is a sexual orientation. Because if you think of a sexual orientation like male heterosexuality, phallometric studies will show that male heterosexuals show substantially more interest in females than males. You also can’t modify that interest; it’s stable through adulthood, just like pedophilia.
I interviewed a psychologist who says pedophilia should be considered a sexual orientation. Also, pedophiles tend to be short and left-handed.