There was a time, not too long ago, when baldness was something you lived with if you were a man, and covered with a wig if you were a woman. (Doctors estimate that one in every five women will experience some sort of hair loss.) Then men, bothered by their receding hairlines, began to wear hairpieces and toupees -- some of which were so obviously fake that they became the butt of comedians' jokes.  Well, things have changed!