I've stayed away from this because, the supporting information is going to piss people off and I can't help that.

In order to get an honest answer, we have to rely on information that has been gathered about paraphiliacs.That means we have to look at the information on sex offenders or paraphiliacs with an impulse disorder. Like it or not. It doesn't matter how you feel about the category.
And for the life of me, I can't find anything that doesn't say its not a 50/50 thing. We know that 50% of parapheliacs have been abused. Its been said that an obsession began to occur approximately around 12 years old.

I'm not a shrink, I'm just going from what I read so, I'm not trying to come off like an expert here.