A girl once told me about a girl she went to school with. She admitted to her that she was into kids. What was she studying to become at university? Primary school teacher. ie. Teaching kids ages 5-10 or so.
A guy I went to school with sexually abused a bunch of kids in the neighbourhood and he was probably younger than 16 at the time.
Some people are kid touchers when they are still kids and make life decisions based around getting access to kids.