Nope. And if I were you, I wouldn't bring this subject up too often on this forum as the concept of involving minors in our community in any way shape or form tends to go very sour, very fast.
I also suggest that you do not get involved with your friend's son's development in this fetish as it may lead to accusations down the road that you do not want to be on the receiving end of. What goes on below your friend's son's belt is none of your business.