Limit with exception

Hi now I want to give my idea about protection of pornography is that good to protect or not good?
First of all I want to describe that what is the pornography? What does it mean? Pornography or porn is the depiction of explicit sexual subject matter for the purposes of sexual excitement. So when we got what is pornography I want to explain that which platform does it have in the world? Pornography has different places in the world and different situations. In some countries they recognize it as other know lade and it’s not important but some countries like Islamic countries are sensitive about it.
My idea is that if we put it under organization it will be not really helpful and good for people already pornography and porn is illegally in all over the world except some countries. If we put this under an organization in countries it will bring some problems like child pornography that is really bad because children are not able to recognize the good and bad things. But in my idea is good and must not limit the people who want to know more about it. But in this position we must pay more attention to the age because nowadays we have this big problem (child pornography) and I think that we must care about this. Also people who are 21 and above are the people that must not have limit in pornography. At all my idea is that limit the pornography is a good thing but with more attention to the ages.