A few weeks ago, I helped my 18-year-old sister move into her freshman dorm at Hillsdale College in Michigan. I was anxious for her -- I worried that the female culture at her school would be similar to that at my own alma mater, Tufts University in Medford, Mass.

As a reserved evangelical from Colorado Springs, Colo., I was shocked by a lot of things at Tufts when I entered in the fall of 2003. What shocked me more than anything, however, was the way women treated other women. I regularly heard young women refer to each other...