To be clear, I meant other reasons than having a persistent sexual attraction towards children. Those other reasons can be: wanting to see physical abuse, seeing how abuse happens, finding a thrill in seeing something illegal, trying to see what gets you aroused, and many other reasons.
The Dutch rapporteur for sexual abuse summarized that it is estimated that about 20% of the people caught for possessing child pornography are actual pedophiles, meaning people with a persistent sexual attraction towards children: http://www.nationaalrapporteur.nl/Images/nationaal-rapporteu...