Fan Casting Not Like Other Girls in Sort by Tropes

On the surface, it's nice to hear someone say you're special. It's flattering to the ego to hear that you're better than the competition. That might be why this line is almost only found in young adult and teen stories. Writers may not expect teens to take subtext or larger social implications into consideration. However it's meant, this line can be interpreted as a backhanded compliment or even outright Condescending Compassion. By saying that your intelligence, sense of humor, chastity, lack of interest in makeup, independence, or whatever make you "different from other guys/girls," it's implied that your gender is inferior by default (compare You Are a Credit to Your Race).