I don't think it depends on age as much as your genetic code for the length of your hair - once you are an adult your body hair will grow to the same length whether you are 20 or 50
I have been Michael's number two guy for about five years, and we make a great team. We're like one of those classic famous teams. He's like Mozart and I'm like Mozart's friend. No, I'm like Butch Cassidy and Michael is like Mozart. You try and hurt Mozart, you're gonna get a bullet in your head, courtesy of Butch Cassidy.