Being harassed at an early age can also be the cause.
From the documentary: 'Are All Men Pedophiles?': (paraphrased) Who we find sexually attractive as adults is the age range that we were attracted to when we first started being attracted to people. As we get older, the spectrum of age groups we are sexually attracted to expands – it is added to.
The child victim of abuse oftentimes may grow into an adult abuser as the cycle spirals on.
However, the number of cases is not much, so it is not certain to cause pedophilia.
I wonder if you realise what you are saying or have thought this through! This statement is part of the reason why this issue remains underground and rarely discussed in non-sentimental terms.
Please note 'conservatively believed'. We are talking about a fifth, to half of the world's population here! And sexual abuse is not just rape. Rape is its most dramatic form, but it has many many others, some subtle and seemingly 'harmless' to an outsider, yet devastating to the 'victim'.
Thus, you have a large percentage of the world's population walking around with twisted and distorted psychologies associated with 'sex'. You @muftii put the phenomenon of pedophilia down to some (unquoted) studies and say very simplistically that pedophiles are brain-deficient, low-IQs. How convenient and neat! But it's bullshit!
Nothing personal, but IMO what you have to say on this issue is superficial and misleading.