The opinions expressed by columnists are their own and do not represent the views of Townhall.com. Sex and gender are serious subjects, but academics, pundits and the pop media have so stretched their meanings to use as weapons of political persuasion that the words sometimes don't mean very much. Communication becomes confusion and distraction. The worst is when we're told to be blind to the obvious differences of the sexes because "identity," not biology, determines who we are.