Oh you're so cool
I moved out at 18, because I wanted to. I had a full time job, paid all my own bills, and had just broken up with a girl I planned to marry (herp derp 18 + marriage = retarded). I wasn't some rebellious punkass who didn't want to follow his family's rules. For me, I was a boy, I was 18, and should be on my own. And so I was. Not everyone lives like that, though. He may have a great home life, and may have no need to move out yet. He may have parents who really enjoy having him around the house (my sister flips out at the thought of my 19 year old niece moving out
), or may just want to help him get on his feet. There's nothing wrong with that.