the age of consent is interesting, in Europe it as low as 13 in some country's (Vatican city is 12)

I'm not sure age of consent matters.  In the US, it's illegal to take or possess photos of subjects below 18 years of age, and it seems like the rest of the world has gone along with that idea, at least online.  I'm not even sure the age of consent in the US is 18 in every state.  In some places a 19 year old can date a 16 year old, but it would be illegal for a 20 year old to date the 16 year old (max 3 years age separation if only one person is an adult).  But it would still be illegal for anyone of any age to take or possess nude pictures of the 16 year old.