Personally, I remember having arousal in connection with my paraphilia before the age of 5. Some people are surprised or incredulous when they hear this, but I find it to be fairly common, especially with sadomasochism (it may be that there is some sort of sampling bias at play, where people with these sorts desires are more likely to report having them at such a young age, as opposed people with normative sexuality). I also remember having romantic type "crushes" on other children from about age 6 or 7, though these were not sexual in nature.
I can agree with this, and also relate, likewise. I remember being very curious and know for a fact that I was engaging in sexual exploration with two friends the same age as me when I was as young as four or five, including two family members around the same age. It seems that there's almost a pattern with people that have a paraphilia to have been sexually active at a young age, so this could stand to support that having a paraphilia does have some ties to experiences, and not just the brain being wired the way it is. Though I do agree wholeheartedly that people with pedophilia or another paraphilia are this way because of a combination of factors. It just does not seem logical to me that one single factor can be at play to make someone a certain way, but I still believe it's possible. The factors can be experience (such as being sexually active at very young ages, or abuse), hormones, and other physiological factors and brain-mind-body factors.
I do have memories of being physically abused, but never sexually abused. I've confronted those people necessary to investigate the reality of these memories, even people directly related to the abuse, such as one man I remember abusing me, but no one was ever able to confirm a single thing. So, these memories could be true or false, but either way, the possibility stands that being abused could play a part in making one a pedophile. However, if there's a factor from my childhood that has played a major role in making me sexually attracted to children, I'd say it would more likely be the fact that I sexually explored at such young ages versus being abused around the same ages. It could be a combination, too.
The important thing to do would be to examine how impacting abuse can be for children, what effects it has on them, and try to figure out in words how this relates to having a paraphilia later on in life. There could be any number of reasons, but it's perfectly reasonable to dig further into the issue, especially on an individual basis. After all, each person is different, and abuse affects everyone differently, however similar. Also, effects from having been abused at any age have been shown to potentially linger throughout a person's entire life, especially if left unaddressed. Perhaps abuse could play a supportive role somehow in a person with a paraphilia, such as the abuse triggering or unveiling the attraction, or repressing it so that it comes out stronger later in life. I'm just speculating here mainly, so sorry if my post seems to be going everywhere. There's just so much to think about when it comes to this issue.