Elephants in Mfolozi make for an interesting parallel:  a while back the park had a problem with a group of sub-adult male elephants that were arbitrarily killing other animals (most notably rhinos) apparently just for fun. The way the park solved the problem was to introduce a large bull elephant into that area of the park - and in no time the young males had been put in their place and their destructive behaviour stopped....what too many boys lack is the presence of a dominant (but constructively so) male in their lives, who can keep them in line and model constructive manhood to them.