Bristol Palin promises Oprah no more sex before marriage

Sarah Palin's unwed mother-daughter Bristol Palin guaranteed InTouch magazine that she would never have sex again before marriage. 

But Oprah Winfrey wonders if such a vow is realistic for a young girl.

"It may be 10 years before you get married. Why set yourself up so that everybody you go out with, you date -- the media is going to be looking at that person, trying to get that person to sell you out, to say, 'Did you have sex or not,'" asked Winfrey.