There's also something called "cognitive dissonance" going on.
http://en.wikipedia.org/wiki/Cognitive_dissonance If you click the link it will explain it better but basically, it can create these problems later when you constantly tell yourself one thing (I'm a good girl, I love my significant other, I'm worth more than my body) and yet you are physically acting in another way (I'm a bad girl, I don't love my significant other enough to keep my body private from other men, and I am only worthwhile because of my body)