http://www.tigerhowarddevorephd.com/2000/12/31/is-it-a-boy-or-a-girl/ (http://www.tigerhowarddevorephd.com/2000/12/31/is-it-a-boy-or-a-girl/)
This documentary looks at the scientific and cultural differences and similarities between men and women, boys and girls, and introduces Intersex as a viable identity for some who don't fit either category.