A league of their own

There are not as many popular women's sports because they don't tend to be as athletic as men.  People want to see the most physical and athletic people going at it and that's why we tend to watch more men's than women's sports.  Although I support women's sports and think it is good that their are leagues like the WNBA, I do not see them becoming as popular as leagues like the NBA and other men's leagues.