Every human I've ever known (including those who seem to be perfect) have some kind of complex about their body in one way or another.  When being photographed it really helps to put aside any notions that prohibit you from relaxing, so that you can have fun, and be your most beautiful self.  Now I don't mean you can't be nervous... everyone gets nervous and thats normal.  What I mean is to be conscious of how your body shows that it's "nervous".  So much of what makes a good portrait are when personality and emotion come through.  If you are tense, your body freezes up (mainly your hands and arms, and your smile becomes forced).  If you are relaxed, your body has softer angles in the hands and arms, and your smile doesn't have that "frozen" look.  The good news is that light and perspective have so much to do with making a person look their best, and then it just takes a moment of comfort or emotion to really showcase your unique beauty and make an amazing photo.  It certainly helps when you trust the person taking your photos!  I loved this boudoir session with Amber, mainly because she was so at ease with her body (she was happy to be directed & posed or to free-form move on her own), and she trusted me to do my job as a photographer.  It's magical when things come together that way.