http://psychology.ucdavis.edu/rainbo...lestation.html
The distinction between a victim's gender and a perpetrator's sexual orientation is important because
many child molesters don't really have an adult sexual orientation. They have
never developed the capacity for mature sexual relationships with other adults, either men or women. Instead, their sexual attractions focus on children – boys, girls, or children of both sexes.
and
the important point is that many child molesters cannot be meaningfully described as homosexuals, heterosexuals, or bisexuals (in the usual sense of those terms) because they are not really capable of a relationship with an adult man or woman. Instead of gender, their sexual attractions are based primarily on age. These individuals – who are often characterized as fixated – are attracted to children, not to men or women.
and
This well known lack of a linkage between homosexuality and child molestation accounts for why relatively little research has directly addressed the issue. Proving something we already know simply isn't a priority.