Why do 18 year olds party so much after graduating high school?

[Chrisss]

Don't they have to work? My brother just graduated and he works full time for a satellite installation company but there are pictures of him and his friends drinking and partying a lot on his facebook. I am 12 turning 13 and isn't this illegal? What is the reasoning? He doesn't want to go to college yet but like I said is working full time. Like I have heard of college parties but not like hes doing with his friends.

[Brittany]

when your a teenager youll understand. hes 18 no one can tell him what to do, and partying is fun for people.thats why they do it.

[creed]

cuz when the hormones start kicking in, the brain starts to fizzle out;; they feel it's their entitlement, & yes, according to state, 18 is still underage for drinking...