It is illegal to post pictures of anyone, including yourself, if they are under 18. There have been several cases against young girls and young boys for this.
It is pornography and illegal at any age. If it is sent to you and you send it on, you are the pornographer and that label stays with you all of your life. You'd be about as welcome as pond scum.
I always wondered if you took a nude picture of yourself when you were 14 doing something sexual, could you get in trouble for child pornography if you forgot about it and it was found in your possessions when you were like 30 or something.
It is illegal to post pictures of anyone, including yourself, if they are under 18. There have been several cases against young girls and young boys for this.
Have a nice day !