My kids, raised in the '90s, experienced the purity movement that swept our evangelical churches. Remember the rose? Every time you have sex, you pluck a petal off until you only have a thorny stick to give your husband.

Today we are talking with Kristin Kobes Du Mez about the origins of the Sexual Purity Movement. Kristen holds a Ph.D. from the University of Notre Dame and is a history and gender study professor at Calvin College. Her research focuses on the intersection of gender, religion, and politics.