When I was in high school, I knew the strength of my desires, and stayed away from girls because I didn't think I had enough self control to handle it.
I was also pretty scared of rejection, and tended to avoid girls for that reason as well.
I guess that's why I wonder if Anne-Marie's behavior really suggests that she would be LD in marriage. I'm certainly HD by any measure I can think of, but my history looks more like Anne-Marie's than like NoMojoBlue's or CattleKid's.