I had also heard of it among twins. I figure it's going to just be one of those things... Kind of like the rock obsession from second grade, or the worm rescue campaign from third grade... I found more rocks in my dryer than clothes. And she spent her recess time collecting worms from the pavement and "saving" them from the boys in her class. That almost got her into some trouble. Her spy campaign from earlier this year was interesting too. She was training some of the boys to be apprentice spies and work for her. The other little girls don't quite know what to make of her sometimes! I'm just glad that for the time being she seems very comfortable being herself
