An estimated 1/4 of all registered sex offenders were minors at the time that they became offenders. The single year of your life when you're most likely to become one is 14.
There are a lot of horror stories like a guy whose 13 year old girlfriend send him a nude photo, her parents found out and reported it, and now he can't live within a certain distance of an elementary school for the rest of his life.
Yeah, if a 24 year old man has pictures of a 13 year old, that's a problem. But a 14 year old boy having pictures of a 13 year old girl?
As a society, we really don't believe in forgiveness.