About two years ago I saw a report on TV where they told that a research group had conducted kind of a lie-detector-test (they scanned the brain in some way) to find out sexual preference. The "samples" included homosexuals, heterosexual pedophiles and homosexual pedophiles.
The data was compiled into a diagram which turned out to consist of four areas which matched the sexual preferences of the underlying people (heterosexual, heterosexual pedophile, homosexual and homosexual pedophile). The areas didn't have sharp boundaries though, because a few people ended up right between two neighboring categories. Nevertheless it provided for example statistical proof that homosexuality and pedophilia are two independent phenomena (contrary to what the Boy Scouts of America want you to believe).
My point is, I think there are two kinds of pedophiles: Natural-born ones and those who would hit on an adult if only they could.
I think, the celibate life of a priest runs detrimental to a healthy psychological and sexual mental evolution.
Sex is natural and not everyone has the willpower to cut it out of his life.
I think, that living in emotional isolation will sooner or later lead to a mental and moral decay at which point doing something immoral to satisfy inner needs becomes only a question of time.