I could post a lengthy diatribe about all the benefits to men and the women who love them, of facial hair (on a man's face). If you have followed this blog, you are already aware of a few of them.
However, I think one of the top selling points as to why a man should grow facial hair is summed up best with the following short YouTube video from dezquilici:
Is there anything more heart-warming and joyful than the sound of a child's laughter?
Aside from that reason, and the sexual ones which I know would come up; what reasons can YOU think of for a man to have facial hair?
Creativity gets bonus points *LAUGH*