Why isn’t there a filter for users under the age of 16

I feel like 12/13/14 year olds shouldn’t be able to see or talk about some of the things you see them talking about on here, as well as seeing some of the things posted on here. Even I’m grossed out at some things and I’m a grown woman. I agree a forum to talk about women’s health and all things woman is a GOOD thing for teens growing up, and can help with self awareness and prevention of pregnancy/STDs, but should CHILDREN really be able to read about how far your mans dick went inside of you????? Where does one draw the line