When do adults start acting "grown up"

Truth is no one acts grown up, rather we tend to act in a different nature than we did back in the day.  Most of us will still through a bitch fit now and again over something stupid but hey it happens to all of us right??

I have noticed that when you get enough adults together in the same room for extended periods of time a certain group of said adults will revert back to their high school ways, and that is when the drama starts and I want to punch people in the face.

This is a two fold thing, some people just don't act there age and truly are acting out like they were still in high school, other people seem to have a yearning for drama and either starting it or jumping in and joining right up!

Fact is who cares what Timmy said about Johnny that is their problem!!  Chalk it up to why can't everyone keep there nose in there own business, but then again life would be boring if we did that