Good question. I was wondering the same thing for the PG. First, the PG-15 does not exist and the PG-13, is for ages 13 and up. PG could be appropriate for certain ages. However, PG-13 could contain dirty language, sexual material, nudity or violence.
I haven't found the answer, but me, and a lot of other people are searching for it. here's an example of people that can do this http://www.godlikeproductions.com/forum1/message834335/pg15#38542093
you mean what you mean
It mean what you don't what does it mean.
Mean is the average.
What does GRI mean? What does GRI mean?
The haudensaunee mean irguios
The correct usage is "what DOES it mean"
he was a mean person who lived with mean people in a mean castle on a mean hill in a mean country in a mean continent in a mean world in a mean solar system in a mean galaxy in a mean universe in a mean dimension
as you do
No, but sometimes "average" means "mean" - when it doesn't mean median, geometric mean, or something else entirely.
He is as mean as a copperhead snakeHe is as mean as an angry bearHe is as mean as a bottle of brandyHe is as mean a black woman