1. Why you shouldn't send inappropriate pictures first of all
It is against the law if your under 18 and you can be put on the sex offenders list if you get caught. If you send a picture to a boy/girl they can use it to embarrass you and once you send a photo to someone you can never get rid of that photo also. If he/she asks you for a photo just say no and then you don't have to worry about getting caught or any embarrassment.
2. Advice to victims of non-consensual sharing of intimate material