[user104658]

It's a very risky area for teens. A friend of my sister in law (she's 10 years younger than us) was very nearly put on the sex offender's register a few years ago because he (then aged 18) showed a nude picture of his ex-girlfriend (then aged 17) to some of his friends. She found out, contacted the police, who seized his phone which had several pictures of her on it that she had sent to him herself... and, technically, any nude picture of someone under 18 is child porn. Even though it was perfectly legal for them to actually be having sex, and he was only 7 months older than her.