Why is looking at/possessing kiddie pron illegal?

[bigred]

If I watch the house across the street get robbed and I enjoy watching it and perhaps even record it so I can look at it later should I go to prison? It's not illegal to not help someone.

I don't find the analogy to be adequate; we are talking about kids here and not inanimate objects.

If they didn't want to be exploited they wouldn't wear such sexy clothes. Overalls are the worst.