Why, because boys need MEN in their lives

The voice of a woman v. the voice of a man can make a magnitude of difference with little boys.
The good thing about being a Big Brother is the Man is willing to be a part of a child's life.
Men can make a difference. 
http://www.bbbs.org/site/c.9iILI3NGKhK6F/b.5962335/k.BE16/Home.htm