The first lady said in an interview with iVillage that the girls "need to explore all of it: the great and the not so great" and "learn lessons from everything."
Mrs. Obama said she wants to raise her girls with "the tools to make judgments" and she hopes she's a good enough role model for them.
She called her daughters, 11-year-old Sasha and 14-year-old Malia, "pretty level-headed kids who can interpret stuff."
As for dating, she said "we're not in that territory yet," but she vows not to embarrass them by talking publicly about their social life.
She is serving as a guest editor this week for the women's website.