In the same universe where we don't just pat them on the head and say "isn't that sweet" when they do other illegal things that they should know are wrong.
You're an idiot, there's no other way to explain your way of thinking.
A 14-year boy is still a boy. He's still learning how to behave, making mistakes and learning from them. He sent a naked photo of himself to a girl. SO FUCKING WHAT? Talk to the parents and let them explain to him why that's not acceptable. It's their responsibility to raise the child and educate him to be able to function in society.
You're arguing that it's acceptable to have laws that give children who make mistakes a criminal record. No, these laws are not acceptable, and they're a sign of how idiotic and shortsighted our society is becoming. People like you are the problem.