They do not care what they are doing is wrong, they do not care about the consequences, and many times rationalize their behavior:
If the child doesn't know it's wrong, then it's OK."
"Well, it could be worse, I didn't beat the child."
"They enjoy it, I'm not hurting them."
Many just simply see children as less-valuable beings, as "meat," a "toy," an "object." They have an inflated sense of self-esteem, so pumped up that they believe the world is here to serve them, that they deserve to get what they want, regardless of what it takes or who it may hurt.
They live a self-serving life.
It's not always because they have an uncontrollable attraction to children. Sometimes it has more to do with doing something you're not supposed to.
Many molesters talk about how the excitement of the idea of being caught was a driving factor. They would abuse a child while riding in the car with the parent driving, or in the home in a room away - not even behind closed doors.
It's a compulsion. It's a thrill. It's unquenchable.
It's usually not a coincidence that so many children are not believed, if they even have the courage to tell, because their abusers are so smart about how they display themselves in public.
They know what good people like - someone who's: nice, helpful, humorous, charitable. Many abuser choose to volunteer their time for charities, visit the sick/elderly, help their neighbors and present themselves as a person parents would want to influence their child, especially if a child is in need of adult guidance or support through a difficult time.
Ask yourself - what would you do, how would you act if you wanted your community to think you were a "model citizen"? As much as these molesters analyze which child would be most vulnerable, they often analyze how to best present themselves so that if a child ever did tell, no one would believe them. It's a proven method of deception that continues to pass the test of time.
Aside from fantasizing about how to make their sexual exploits more exciting and stimulating (variety is the spice of life) they're thinking about what they did wrong - why they got caught and how to do it "smarter" the next time.
All that time sitting in jail - most likely with other rapists and child molesters, there's nothing but opportunities to think, analyze, plan.