[Satan]

Why is this so bad? If their bodies are mature enough, I don't see a problem with them doing so. I don't encourage it, but I don't see a problem with it, as they should be well educated on how to do it safely.

Bodies being mature =/= mentally and emotionally mature.

Not to mention, things like that spread around because the guy the girl sends it to is more than likely going to show all his buddies, or a next girlfriend is going to spread it around and call her a whore for doing it, and etc.

Then you can end up with the images being posted on the internet, getting into the hand of pedophiles, etc.