Personally, I feel that one should never loose your childish nature, and although perhaps it is now inappropriate to draw cartoon penis's onto everything, and talk about the idle social drama of years 10-13. Having a child-like quality is something that tends to be lost, and replaced by a seriousness that once embraced fully is hard to give back. My parents are a fine example to me that you can still grow up and remain youthful minded at the best of times. And so I'm sorry to have to say that Peter pan was wrong, and that you can have the best of both worlds!!
........Over and out.